Is it worth being friends with somebody who doesn't really respond or talk to you?

[Jack]

I was close friends with a guy for a while and I've been trying to keep in touch with him after high school. Thing is I message him over facebook and it says seen but he never replies. He never seems to reply with text or answer phone calls. I brought this up with him. Few times I talked to himm to see what's going on or if I annoy him and he just doesn't want to be friends and stuff. He said it wasn't me and that he just needs some time alone sometimes. Thing is he usually talks to other people a lot even when he doesn't reply to me.

The thing is I'm a bit socially awkward, some people (friends) have told me that I don't really pick up on social ques a lot and really don't assume the unsaid enough. Which I will admit is kinda true and it is something I've been working on. So I was just wondering if I've really just been bugging and annoying this guy because he doesn't really want to be friends with me (which is fine) or if it is something else that I've been missing?

I really feel like he doesn't really want to be bothered with me anymore but to be honest I really don't want to just assume anything.