venting & some advice? P.S the story is quite long.

I've noticed a lot of women come here to vent their feelings as well and well i just need someone to speak about this and some kind of opinions as well. 

My boyfriend is 18 years old, he's gone through hell and back and well let me just summarize some of his life. His father was a drug addict who met his mother and she fell pregnant with him when she was 19 years old, she gave birth at 20 years old. Throughout that time she sort of dealt with my the fathers abusive words and abusive actions because of this. at the age of 4 or 5 the father got locked up because of some charges and while he was locked up he would send my boyfriend and his mother thousands and thousands of dollars and bought her a brand new car while he was in jail and his grandfather (the father of the father) paid in full a brand new townhouse so that my boyfriend had a place to call home. Well during that time his mother was what you call a whore. she would bring guys after guys in the house, never spent the money that she was supposed to spend on her son but instead spent it on providing for her bum ass boyfriends. well, after being a whore she found a man who took care of her and helped her and more. She always seemed to push her son (my boyfriend) out of the picture for other guys. he grew up around these drug dealing strangers and well once he hit 13 he found himself deeply depressed and started smoking weed to escape from his reality. later that escalated into him doing drugs and attempt suicide. Since he was born his mother would tell everyone she was going to kick him out as soon as he turned 18. well, about a week before he turned 18 i was over his house and i had just gotten a puppy that they all agreed would be okay to come over. well the mother constantly would have outbursts and outbursts on her son for no apparent reason and he always repeated "mom please stop i don't wanna have an outburst as well you really aren't going to like it" well he had an outburst when my puppy went upstairs that morning a peed on the carpet (the puppy was 6 weeks old) and when he went to clean it he  asked where the pee was and she screamed at him and called him a stupid bitch and smacked him in the head and he bursted and he grabbed her like a beat hug position and her boyfriend grabbed my boyfriend and threw him into a closet (he threw him so hard the closet door broke) and then threw him outside. out of anger and pushed a table that was outside and it shattered into pieces and when he tried to get inside to get me they didn't let him (keep in mind they threw his bed and all his things were in a fucked up basement because she wanted her boyfriends son who only comes on saturdays to have his own room so she threw her own son in the dirty basement) . and i came upstairs. she told him he can never come back to the house and if he does she would call the police on him. he was sleeping in the street for 2 days until his grandmother took responsibility for him and toon him in. my boyfriend doesn't spend time at their house, he goes there to lay his head and shower and they offer to feed him and they do everything else because they want to. Well about 2 weeks ago my boyfriend had no way to come see me at 3 A.M and i needed to go to the hospital because i was suffering severe pain (i have a very large cyst on my left ovary and they said if i had a fever and severe pain that didn't go away with my pain meds to go to the ER because it could mean my ovary twisted) well, he took his grandfather's car, scared to death because he didn't know what happened to me. when we came back from the hospital his headlights weren't on so he got pulled over got a $60 fine and a citation for driving without a license. my boyfriend took full responsibility. well his grandmother came in his room 2 days later snooping around and found the citation in his room and told everyone except her husband about it. keep in mind she didn't have to do anything at all like pay for a lawyer pay for the ticket none of that. well because she didn't tell her husband when the citation came in the grandmother & grandfather fought and kicked him out. His grandmother is disrespectful to me. she tells me all the time how she really doesn't like me at her house to not come to her house that she doesn't wanna see me at all and what not. (keep in mind they only see me for 5 minuets when i go get my boyfriend from their house). but she literally asks me for everything. she tells me to cancel my doctors appointments to help her husband while she's away and she tells me to go to their house and make him dinner and tells me to miss school to help my boyfriend. (i'm only 17 years old in my senior year of high school). She also talks shit to me saying i'm way too young to be so devoted to her grandson and i kid you not she told me to go fuck guys before i devote myself to him. Me and him have been together for 1 year 10 months and i've known him since the 6th grade. i have always looked after him, guided him through the dark paths of depression. stopped him from committing suicide hundreds of times and have always been there for him in the past 6 and a half years. I'm very upset about this and was wondering what you guys would do in my position at this age and what you think about this situation and if i have a reason to be mad too. Thanks in advance if you read all of this & i apologize for it being so long.