I'm just so fed up, am I wrong for what I did?

I'm finally calling quits with my boyfriend of 3 months. All he does is accuse me everyday. Everyday he accuses me of my own step father which is sick. I'm just so fed up. I'm at school and he texted me saying, "oh I see you're friends are more important than texting me." I'm only 17 I shouldn't be dealing with this but I still feel guilty. Am I wrong for just ending it and blocking his number and every social media account he has? When I hang out with my sister he gets jealous. Whenever I do anything with anyone else he gets jealous. Oh and he accuses me of being a lesbian. Oh and the sex is horrible.