Is it normal to have to many expectations?!?

Idk why but i feel like my heart drops when my boyfriend dont look at me, were in cl and Im the TA (Teacher Aid) *high school* I understand he is scared to pay to much attention to me cause its a possibility for me to get kicked out.. but i hate the feeling of him just walkin by me and not saying anything to me, or when were in cl and instead of him coming over and talking to me he decides to talk to his friends... i cant just go over there cause im scared... i like it better when he comes to me, it makes me feel wanted and loved and like nothn else in the world could ever hurt me and then he says he needs to go and its all ruined and i swear my heart breaks a little more everytime he walks away! Is there somthing wrong with me, am i a bad gf... i no i should ease up but weve been together for a year and 1month, my longest relationship! my longest relationship b4 him was 3 months, every bf ive had has dumped me.. and im scared my bf is just gonna get tired of me and leave... idk why but i just cant let my self act like nothing is wrong... i no he loves me but...