Uncontrollable Boyfriend.

My boyfriend & I have been dating for 1 year & 2 months. we dated off and on june & july of 2015. he cheated on me in the beginning of july & left me. we ended up working things out and getting back together October 31, 2015. Over the past year he has lied to me, talked to other girls behind my back, made a meetme, been to jail 2 times within 2 weeks for having weed on school campus, & probably more. We never can talk anything out because he blames it all on me. I've asked him before to stop smoking weed & he claims that he has, but a guy friend i'm close to that he tells all his secrets to informed me that he has marijuana plants growing at his house. I just got home from staying at his house for the past 4 nights & on the 2nd or 3rd night i found another woman's thong in his bed. he claims he thought it was mine. I honestly don't trust him, but he does live with his mom & dad. I'm 16 & he will be 19 January 30th. i understand there will be quite a bit of hate comments because i've stayed with him. but understand i fell in love with this guy when i was 14 & he was my first.. But is this normal for most guys...? to ignore what we want & lie?