Say I want to swallow my pride and truly give Christianity another shot. I want to experience and feel the holy spirit, and have Christ reveal himself to me and come into my heart.

Luke 15:
3 Then Jesus told them this parable:
4 Suppose one of you has a hundred sheep and loses one of them. Doesnt he leave the ninety-nine in the open country and go after the lost sheep until he finds it?
5 And when he finds it, he joyfully puts it on his shoulders
6 and goes home. Then he calls his friends and neighbors together and says, Rejoice with me; I have found my lost sheep.
7 I tell you that in the same way there will be more rejoicing in heaven over one sinner who repents than over ninety-nine righteous persons who do not need to repent.
The Parable of the Lost Coin
8 Or suppose a woman has ten silver coins
[a] and loses one. Doesnt she light a lamp, sweep the house and search carefully until she finds it?
9 And when she finds it, she calls her friends and neighbors together and says, Rejoice with me; I have found my lost coin.
10 In the same way, I tell you, there is rejoicing in the presence of the angels of God over one sinner who repents.
Welcome home!
-Prayed daily and worked on my personal relationship with God. We're talking 15 minute, personal conversations about my daily life.
-Asked God to come into my heart multiple times, and asked him daily to have me execute the plan he has for me.
-Studied the Bible both in church, and personally on my own (I've read the Bible cover to cover).
-Thanked God for every good thing that happened, and constantly strived to be a better person.
No disrespect intended, but these things mean nothing on their own. It would be like if I recorded all of the dates I had before my wife and I got married, and listed the restaurants we went to, and the movies we saw, and the things we did together, and prescribed these "actions" to another as a sure fire way to get a woman way out of your league to marry you.
These "things" probably mean little to nothing to her as well. It was the thought and love behind these activities that made all of the difference in the world. It is not what you do that is important, it is why you are doing it, and a willingness to do it without a time constraint or expectation on your part. In short you need to present yourself completely open to the mercy and will of God, for as long as it takes. A entire life Spent in the pursuit of this love of God is a life well lived!!
Look at the parable in Luke 11:
5 Then Jesus said to them, Suppose you have a friend, and you go to him at midnight and say, Friend, lend me three loaves of bread;
6 a friend of mine on a journey has come to me, and I have no food to offer him.
7 And suppose the one inside answers, Dont bother me. The door is already locked, and my children and I are in bed. I cant get up and give you anything.
8 I tell you, even though he will not get up and give you the bread because of friendship, yet because of your shameless audacity
[e] he will surely get up and give you as much as you need.
9 So I say to you: Ask and it will be given to you; seek and you will find; knock and the door will be opened to you.
10 For everyone who asks receives; the one who seeks finds; and to the one who knocks, the door will be opened.
11 Which of you fathers, if your son asks for
[f] a fish, will give him a snake instead?
12 Or if he asks for an egg, will give him a scorpion?
13 If you then, though you are evil, know how to give good gifts to your children,
how much more will your Father in heaven give the Holy Spirit to those who ask him!
We take our love that we have and want from Christ and we Ask in prayer, we Seek in the bible and in places like this, and we knock by repeating this process till our hearts get what it wants. Even if that means we have to live the rest of our lives in silence.
I found God usually requires just alittle bit more than what we are generally willing to give. So in the end it is best to simply have what He asks. That means if we put a time table of 2 weeks on our "seeking" process then He would require 3. So when He asks for all of your love that your Heart, Mind Spirit, and strength can offer, then it is best to let Him have it up front with all that you can give. If you can't or don't know how to do this then ask Him to help you.
So what happened when I said "Nope, God doesn't exist and I do not believe Jesus died for me"? Nothing. Absolutely nothing. I didn't feel a void in my heart, I didn't feel less happy about my life, and I didn't become any more immoral towards other people. I actually became happier, and now I much more enjoy my perspective on existence and who we really are as people.
Are you asking, why? The answer should be very apparent to you.
What else could I do to feel the holy spirit?
Approach God with all of your being and do not "expect to feel" anything. Humble yourself before the Lord and allow Him to lift you up.
This isn't a rhetorical question or attack of any sort, I genuinely want to know what else I could have done. Like I said, I felt no different after dropping the relationship with God that I so strongly had for over a decade.
Not an attack from me either. Infact I find this very hard to write, but if their was no change then that should tell you your "relationship" was not what you think it was.
When you listed all of the attributes of your christianity it was solely based on what you had done for God. What type of
relationships are completely one sided like that? That would be like me telling you of my "relationship" with Cindy Crawford back in high school. Despite my best efforts, if I did not know this woman, did it really mean I was in a true
relationship?
When you start again do not look to your church to sustain your relationship with God. Meaning do not look to follow a prescribed path full of rituals and pop christian activities to build a relationship for you. Go to God just as you are, and empty your heart. Tell Him about this uncomfortable silence, and ask Him to take away anything in your life that is keeping you from hearing what He has to say from you. *this is Key: You must want this with all of your Heart, Mind, Spirit and strength. Even if that one thing is your health or a prized relationship, money or whatever it is. Want this with every fiber of your being and pray this prayer every night till you get what you want, with no expectation of a time line nor a return on your investment, and you will truly get every thing your Heart wants.