help!?

so me and my bf have been dating for 3 months and im kinda having trouble. everything has been great except im a very emotional person and sometimes it seems like he doesnt care or ill tell him why im sad and basically say its my fault. i texted him about it and then he left me on open then i texted him an hour later and he left me on delivered for 4 hours. he has a hard time opening up and caring about people because of his childhood trama and says hes happy in our relationship but i just need help or tips on how i can help both of us. i always try to communicate and ill also talk to him after the break ends but is there any advice anyone can give me? 💛