My ex is so confusing. HELP!

So my ex broke up with back in october because he thought he didn’t make me happy. Then we got back together a bunch of times, for only 5 days at max probably, and then he would leave me again. Although it doesn’t seem like it, i know that he genuinley loved me i could feel it. In March, he broke up with me again, but not for the same reason. He sounded like he was extremely angered by something I did. He has trust issues and thinks i cheated on him, but that’s so untrue i was genuinely inlove with him and i still am. Instead of breaking up with me, he blocked me, and of course unfollowed me everywhere. Yet he still used to stalk my page and see my instagram stories (which you can’t see unless you open the person’s page). Then he blocked me on instagram too, then unblocked my number and instagram, then again blocked. We’re both seniors in the same school and i always catch him staring at me. Because of his trust issues, he seems convinced i did something, and he would not ever believe me. And i tried to talk to him ay the beginning of April about it, he just told to “fuck off slut”. Now im still blocked everywhere with no explanation and honestly i don’t know what to do. He acts  like this but i knew he did love me when we were together, i just want to know  of he really is over it then why is he doing all these things that obviously hint he still thinks of me.