Update?? And also help

So recently i got the person that used to like’s number , i was really happy at first when i found out , i started messaging him daily and it would be pretty fun :) but suddenly he stopped talking to me again . It really broke my heart and the thing was that it isn’t even the first time he broke my heart , i kept thinking to myself why does he randomly stop talking to me . Also i found out that he might have a crush on someone , i feel so stupid even liking him , after a while , he started leaving me on read , never seeing my messages and just acts dry . I was in this groupchat with him in it and i saw that he talks to this other person and i had a suspicion that he likes her , he named her something cute on his phone too and i dont even know why i still try to talk to him , should i just stop talking to him and give up ?