ex- PLEASE HELP

my ex and i have been separated for many months now and we fucked once since we broke up. i miss him like crazy but i feel as if he hates me. he tells his friends that but i feel like he doesn’t. we blocked eachother on everything but occasionally find ways to talk for 2 minutes before shit breaks loose. i don’t know what to do because i cant move on. can someone please help give me something to say to him when we’re alone or that i can text him without sounding crazy like i want him back? keep in mind- he tends to get mad easily when we talk about the past. anything will help. thanks ladies