Whats his deal...im confused now?

There's this guy who I've been hookup buddies with for the past few months and I am pretty sure its over since the last time I saw him was at a party and I saw him chatting up another girl. I can't ume anything but he never really returns my texts either, which I'm accepting means he's not into me. I know I made a mistake the last time we got together but I let my ego get in the way because I was into someone else but he moved so now we only chat on facebook once in a while. Now I've totally fallen for my hookup buddy and I'm feeling bad that I'm probably not gonna ever get the chance to tell him how I feel about all this. Its weird how most of the time he ignores my messages but responds once every few weeks. I learned my lesson not to have too soon and without really getting to know the guy. Big no-no and I learned from it. I realize my mistake and want to move forward from it. I haden't seen him or contacted him at all in a few weeks. He called a few nights ago but I didn't pick up or return the call. I finally called him back last night and I didn’t get in more than like 2 minuntes of a conversation with him before he said he was getting another call and asked if he could call me later. He basically said he wanted to see what I was up to that night and then we just talked about school stuff. I’m confused, I thought guys don’t call if they don’t care. Seriously, its bugging me that once I step back he has to reach out to me then when I do he acts like he doesn’t care. I’m just done with all of it.I bet the same thing will happen another month down the line if I quit contacting him. I don’t want a fwb thing and am ready to drop this if he doesn’t get it together. I really hate to think he's stringing me along. I wanna make it clear I'm not about all that and hope that if he doesn't want to move forward with me we can atleast be friends. I feel bad that I started all this off on the wrong foot and I'm trying to get back on the right path but its hard that I might have to accept that its too late or maybe he never cared to begin with.