I don't know how to repair my relationship with God

So I'm 20 years old and I'm a Christian. But here lately I've been failing hard. Real hard. I know God is supposed to love us no matter what but I just feel unlovable and unforgivable. I've been driven by lust, I haven't been to church in a while, and church has even made me uncomfortable lately and I feel guilty about that. I even told a friend the other day that I do believe in God, but I'm not so sure about the Bible. Now thinking back I don't know why I said that. I hate that I said that and I'm afraid He won't forgive me for that. I do believe in it, but the friend I was talking to is bisexual and was talking about how the Bible is kinda crap and I guess I felt pressured to just agree. I know in my heart I believe in it. I'm just so caught up in everything I feel stuck. I don't know how to get back on track with God. I'm afraid I've gone too far for Him and that terrifies me.