I feel like committing suicide?

Recently, I've been going through a lot. I've adjusted to a lot of changes in such a small amount of time. My mom is a gambler, my dad is in jail, and my cousin and boyfriend took me in and they moved from Philly to New Jersey just for me. I am absolutely grateful for the things they've done for me. They wanted me to experience high school like they did and they wanted me to be happy because I never was happy when I lived with my mom. My grades were slipping after 2nd marking period and I went through a lot of anxiety and I ran away and went to the ER for an overdose on Tylenol. I did those things because I didn't want to try anymore and I didn't feel like I was giving them what they needed from me and they're not asking for straight a's or anything. I did fine this marking period but English was horrible. I had a problem with lying to them about turning in certain things for school just because I wanted to stall time and do it later. And I'm not lazy, I just procrastinated a lot. Of course they found out and they got upset because I wasn't communicating with them and I haven't had a real conversation with them in a month. I feel like I'm living in a dormitory with them and we're all strangers. I never apologized to them because I'm afraid they're going to hit me, because my mom did when I was in 5th grade and my cousin hit her brother back then. Her boyfriend doesn't know about her abusing her brother but he does know about my mom. That's the real reason why I can't talk to them because I'm so scared she'll hit me. And they're so infuriated with me because I won't speak up. They said that if I don't speak up by the end of finals (this Tuesday), I can go live somewhere else. I have no other home and I have no other family that would take me in because they'd probably side with her. And they look at this communication thing as if I murdered someone and I'm not a bad kid at all. I did very well before high school started, I never go into drugs or alcohol.Icanttypemore