Is it okay/normal for a Christian teen to daydream about sex sometimes?

I feel like i've been in church all my life. and i am struggling with this. i think about sex constantly. and i know its wrong. the worst part about it is that I WANT TO THINK ABOUT IT, i enjoy thinking about it. i feel so under thee power of sin. i want to have sex with my boyfriend sometime this month. i want to, really bad. so bad, i'll be disappointed if i don't get to. but i know its wrong. i need some serious help. i have no idea what to do. please take the time to give me some guidance. i thank u in advance. i would also appreciate if athyeists/rude people not give any answers that would corrupt my fragile mind anymore.