Hello,
Well a few things, since you do bodybuilding, drinking could be messing you up big time on that, calories from drinking could be better spent on other calories.
The Bible actually does not say drinking is all that bad, too be honest I think you simply ought to regulate it and put a balance to it, drinking too much not only will affect your health, your mood and your time, it is also very costly and if you are very drunk can cause trouble while on probation.
1 Timothy 5:23 "Stop drinking only water, and use a little wine because of your stomach and your frequent illnesses."
Proverbs 31:6 "Give beer to those who are perishing, wine to those who are in anguish;"
Proverbs 31:7 "let them drink and forget their poverty and remember their misery no more."
However you have so much more hope than just living in anguish,
Proverbs 31:4 "It is not for kings, O Lemuel--not for kings to drink wine, not for rulers to crave beer,"
1 Peter 2:9 "But you are a chosen people, a royal priesthood, a holy nation, a people belonging to God, that you may declare the praises of him who called you out of darkness into his wonderful light."
You probably understand alot of about pain and pushing through your pain because you do bodybuilding, it is aesthetic compared to powerlifting but either way it is not a walk in the park, you don't just become ripped overnight by eating twinkies and watching television all day.
The same thing is with your faith,
Matthew 7:24 "Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock."
Just like bodybuilding you must push yourself, so you must push and challenge yourself with the gospel, in bodybuilding you often need supplements to accomplish what you could not otherwise accomplish.
For the gospel the supplements you need are...
The Holy Spirit,
John 16:13 "But when he, the Spirit of truth, comes, he will guide you into all truth. He will not speak on his own; he will speak only what he hears, and he will tell you what is yet to come."
The blood and flesh of Jesus Christ
John 6:53 "Jesus said to them, "I tell you the truth, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you."
You also need the right genetics, a mule cannot become a horse no matter how well you train it, you need to be a pure bred champion horse, and for this you must become born again!
Jeremiah 12:5 "If you have raced with men on foot and they have worn you out, how can you compete with horses? If you stumble in safe country, how will you manage in the thickets by the Jordan?"
John 3:5 "Jesus answered, "I tell you the truth, no one can enter the kingdom of God unless he is born of water and the Spirit."
How do you get all of these things?
One way and and two things to have and do.
John 14:6 "Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me."
Jesus is the only way,
it is by faith
Romans 5:1 "Therefore, since we have been justified through faith, we have peace with God through our Lord Jesus Christ,"
Now how does one get faith?
Romans 10:17 "Consequently, faith comes from hearing the message, and the message is heard through the word of Christ."
What can you do with this?
Two things,
1. Ask with faith
Matthew 7:7 "Ask and it will be given to you; seek and you will find; knock and the door will be opened to you."
2. Obey with faith
Luke 11:28 "He replied, "Blessed rather are those who hear the word of God and obey it."
For not feeling good about a girlfriend,
Proverbs 31:3 "do not spend your strength on women, your vigor on those who ruin kings."
Because you do not yet have a girlfriend, you could really just step it up in your faith life, in your bodybuilding and your career, build yourself up on a solid foundation first, you are still young. By then you will not only be very well equipped and desirable, you will also be more mature and prepared for a relationship. It is good that you do not have a girlfriend yet because you have more time to really focus on other things to build yourself up first and establish a strong foundation, living your life centered on Christ Jesus.
Take care and God bless you,