Talking to my ex

So me and my ex broke up around the end of August. I had never been in a relationship before and he was my first love. He broke up with me because he would get jealous for me talking (as in having conversations) with other guys etc. he thought him getting angry at me all the time was hurting me more than helping so he broke up with me to help me. Anyways, other things happened and now he doesn’t speak to me and we haven’t spoken for 4 months. We see eachother everyday at school and make weird eye contact. He isn’t dating anyone and I have tried but I can never find anyone like him. I need help idk if I should just get over myself and text him or just let it be? Help me