My boyfriend treats me badly help?

i have been with my boyfriend nearly 2 years and im only nearly 17, but carrying his child. i love him so much but i dont get it back, he cheated on me twice (slep with other women) one of which was his ex girlfriend who he was with for first 4 months of our relationship, the second his exuse was he thought i was cheatin on him, and he then continued to speak to the girl he cheated on me with over the internet and was chattin up other women as well and i was pregnant at this time when i found out. he has really destroyed my confidence, he shouts at me if he doesnt like what i have on or if i wear makeup or do my hair nice, he is abusive aswell and i dont unerstand, he says i drive him to it but i dont see how, he has put huge bruises on me and the first time he was really sorry and sed it would happen agen but it has continued and is a reaccuring thing now, he gets worse, he has kiked slapped ounched me and daggs me round like im a rag doll, he is really insucure about me and always ecuses me of doing somethin behind his back but i havnt, i dont evan go out coz he goes on at me, he calls me names and takes the mick out of me for the insucurities i have about my self and i have tol him loads it hurts me but he carries on sayin hes havin a laugh, he has a bad attitude and also snaps at me, i am ALWAYS on edge around him, like i was laughin at the tv and he had a go at me! i cant do anythin, he thretends to take me to an alley and beat me, and he doesnt evan care that im pregnant and he could harm the baby. i love him and were going to be a family but he needs to change and i have tried loads and nothin has worked i dont no what to do. all we have to do is go to the petrol station and he will call me a slut for starin at people when i dont! i cant not look at the person serving me can i ! i love him and i really dont no what to do! im just not myself anymore i use to have a really bubbly personalaty and now i dont evan speak. i really need some support aswell at the moment and im goin to be a mum aswel which i wil probly need him more, (( by the way im 36 weeks pregnant)), please ryt bak and give me some advice and sorry this is so long.