Can anyone help?

Okay, so I have been talking to this guy for about three months, and from the beginning there has been the same issue. He takes hours to reply. I feel like I cannot fully trust him. We keep having the same arguments over and over again, he always apologizes and says he’s gonna do better, or he’s trying but he’s really not. His excuses are always that he is busy or asleep. Recently, I started calling him out for being active on Instagram while not replying to me, and now his excuse is that his computer is logged into Instagram and he is too lazy to log out, which does not really make sense to me. I try to be very understanding. I know his job takes a big toll on him, and I know he cannot really be on his phone at work. I also understand that when he gets home, he just wants to sleep. My issue is that I am not asking for constant attention. I just want him to pick up the phone and communicate. Even a quick message would be enough because as of right now this is our only form of communication and we’ve gotten absolutely nowhere these past few months . Idk if I am being childish or overreacting but he makes it seem that way and says I should move on, or stop holding onto it, but I honestly do not feel like I am asking for much. Still, to this day, we keep dealing with the same problem. We argued about this same thing today. At this point I’m not sure what I should do, I know it’s probably best if I just cut ties i it’s hard. I really like him and want to be with him but he’s making it so hard for me to stay