Worst advert for Christianity? Not even close. There have been, still are, and will be, people who murder, beat down, abuse and deceit others in the name of their savior. Horrific stuff, and they're often very successful in it. There is a reason why people talk about christian hypocrisy, because they see people who talk about the love of God, but treat people with ways that have nothing to do with love - or God. They don't want people to be freed from their chains, they're putting on more.
Whenever I'm confused about doctrine, of I feel I don't understand everything (I will NEVER in this life understand everything), I comfort myself with this:
"If I speak in the tongues of men and of angels, but have not love, I am a noisy gong or a clanging cymbal. And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but have not love, I am nothing. If I give away all I have, and if I deliver up my body to be burned, but have not love, I gain nothing.
Love is patient and kind; love does not envy or boast; it is not arrogant or rude. It does not insist on its own way; it is not irritable or resentful, it does not rejoice at wrongdoing, but rejoices with the truth. Love bears all things, believes all things, hopes all things, endures all things."
I do not treat Bible as some eloquent mystery that I have to solve by myself. I don't think I have to be the wisest man. I think it's the living word, and with guidance I can perhaps tomorrow understand something that I don't understand now, but to think of it as some overbearing task isn't good for me. What about the people who have less understanding than me? What about those who have mental handicaps? I am lowly, and my understanding is limited, and God doesn't love us for our intellect. I don't even know how many time's I've been wrong about scripture, or how many times I will be wrong about it. And even if I was right, what if I became a pharisee and started exalting myself, stepping on others? All that matters to me, an idiot on this planet, is Christ on the cross praying for those who crucified Him. Because they didn't know what they were doing. I don't often know what I'm doing either.
I can't solve everything, and I don't "understand all mysteries and all knowledge" but I can love. Do you know what brought me to Christ? The thought that perhaps, there is a God, and perhaps He can love even me with real love, not just words. Because I'm desperate and I need it. Do you know what keeps me believing in Christ, especially when I'm in the middle of a turmoil or suffering from weak faith? Love again, and I'm often comforted by loving people, encouraging me, and I crawl back to a loving God whose grace is amazing. The more I understand I need God's love, the more I allow God's love in, and the more I can love as a result. It's like a fountain that not only replenishes itself, it's growing. And it's God's work.
So don't worry. You'll be granted, in time, all the understanding, patience and wisdom you really need. He who seeks finds. You can ask anything good in prayer. Jesus said he'll give us whatever we ask. So pray. Pray for your peace of mind, pray for your boyfriend, pray for everything - and in time you will learn to trust Him. Because you'll have no other option. Whatever troubles and confusion and fears we have, we'll take to Him. If we want to take it all on ourselves, we will fail. Of course, because we are what are, we stray away and we try to do everything ourselves, because sometimes it's hard to trust something we can't see.
I'll use myself as an example. Whenever I have a battle with sin, or my (or loved ones') salvation, my first instinct is that I have to do it myself. I have to be holy. You know what happens? It gets worse. I start to live in fear. I start to worry. I get horrible anxiety. And I fall, again and again. When I finally come to my senses and understand that I just can't do this, I humble myself and go to Christ. It's like I have to learn everything the hard way, but again, in the end there's Christ, and a man crawling to Him. There's forgiveness, relief, joy in Him. I'm not beaten down anymore because I actually took my burdens and left them for Christ to take care of, and something grows in me. And what do I do, with such heavy weight taken from my heart? I'm grateful. I'm glad. I want to love more because I was loved first. If someone wants something, I want to give it to them. If someone needs comfort, I want to give it to them. I want to be like Christ to them, and treat them like they were Christ to me. People, who were like Christ to me, and treated me like I was Christ to them, have only encouraged me and my faith. I may respond to fear and condemnation, but in the end my faith is not based on it, at all.
Christ does this to me, no matter how many times I fall. I can only pray that I would always remember this. I'm not supposed to run around in fear, I'm supposed to actually trust God, that He is the Father who doesn't give us scorpions when we ask for bread. He gets to be God, I only get to be a lowly man. He gets to carry even our sins in Jesus Christ. And I get to believe it. And if I don't, I'll eventually find myself in a place where I have no other choice. It may sound "wrong" for some people, but to me it's an absolute comfort.
What you're going through is not a bad advert to anything. It's about an honest struggle, about a hungry heart searching for God in a confusing world. Everyone can relate to a struggle. And through struggles, we get more patience, perseverance, hope and faith. We're molded that way.
Said a prayer for you and your loved ones, for peace, guidance and comfort to come your way.