I'm so confused

ok, my x-boyfriend and I had a REALLY bad break up 3 months ago. We honestly just didn’t say the best things to eachother. We fought a lot because this girl invited him to a make out party and I didn’t want him to go because I wasn’t invited. (obviously if it’s a make out party) But, he got mad and blew up @ me. Well, when school started back up again, we realized that we have a LOT of classes with eachother and we have to practice on the same soccer field with eachother. At first it was kinda awkward but then we got over it. But, he always kept staring @ me. A lot of people noticed. I know that naturally when you go through a bad break up your still going to look at that person, but constantly? I called him to make sure that we were done fighting. And he said that it the whole thing was stupid and that we shouldn’t let that get in the way of a good friendship. We talked to eachother for 2 hours catching up on things with eachother. I asked him if he liked anybody but he refused to answer the question. He said that I know the person and he just didn’t want to say something because we just got everything worked out. (I know it’s probabley me but anyways….) At school he flirts with me a lot and he does it at practice to. And EVERYONE at school keeps asking us why we broke up. But, it was 3 months ago so we don’t even bother answering them. Does he still like me? Personally I think we’re just friends but lots of my friends say that he still likes me and is planning on asking me back out when everything settles down at school. But, I can’t picture us together again. I know I still like him but I’m just afraid of getting hurt again. I know I sound pathetic, but should I even bother? I know that everything deserves a second chance but are somethings just unforgiveable?