Am i jealousor obssesed or both?

okay so here is my story. I have been in a relationship where arguments don't seem to end. I admit that its mostly because of me i am emotionally sensitive and my boyfriend of 2 years and 11 months is a joker who never knows wen to stop joking. However let me get to the point, i am afraid that i may be obsessed with him or maybe jealous. i want him to be with me every second. i hate it when he is with friends. i feel that he cares more of his stupid friend then me even when he tells me that he cares more of me then them. he is always complaining that he cuts plans with them just to be with me. He told me himself that i am not the center of his world. Later on he tells me that he only said that because he was mad. yes i have asked myself if he still loves me. i cant stop thinking of him. i think of him as i did when we started dating. i check my phone every second to see if he called like right now its 10:22pm and he hasn't called and I'm already impatient. I'm wait on him to call me and it only has been 6 hours since i have seen him.I don't understand that when we started dating we broke up after 4 months and i just felt that it was hard to breath without him. He was like a song in my mind that played over and over. he says that he felt the same when we didn't even share much . I feel that i can't live without him i don't know why....if everything that he is tells me that i shouldn't miss him. i have lost a friend because i wanted to be with him and then her. i have noticed that he is too afraid to lose his friends because he try to satisfy them for the lost time that they weren't together. i don't know what happening inside me. I feel that i only need his attention, his love his arms to keep me warm. but i"m scared what will happen when he is gone? My question is what is happening with me?