Help I need advice about what to do about my ex!?

My boyfriend just broke up with me after 4 years and Im really going crazy. I made him my world. He was and is my everything. I work with him, I go to college with him, I have made my life revolve around him and I loved it. I have OCD and as a child I would walk around the house every night checking all the plug ins to make sure they were pluged in all the way and if I didnt I would feel like the house was going to catch on fire... I have no dout that my ODC has gotten in my lover. 5 months ago he told me that he didnt have feelings for me anymore and I couldnt stand it. I didnt know what to do and I freaked out. So I kept telling him that we were together for so long please just stay with me another month to see if your feeling would change,, month after month went by and nothin changed. He told me the only reason we were together was to make me happy because he didnt wanna see me sad. So eventually I knew the say would come wen he would leave me but I knew I couldnt cope and it has happened 8 weeks ago and Im still in the same spot. Hes all I can think about.. him telling me that he wanted to be with me forever and that he was never gonna leave me. I think I knew he would thats why every day all the time when we were together I would as him if he was every gonna leave me. I am obsessed and I need help. I wake up in panic everyday for the fact that I cant see him. We were litterally togeter 24 7 a day. And the sad thing is I still text him and whether hes being nice ot not as long as he is talking to me I feel better. When I cant talk to him at all or he ignores me thats when I freak out. I dont understand how u can be with someone for so long ALL THE TIME to nothing and not care. He told me he was already talking to someone else and I just cant believe it. When he got with me 4 years ago he left someone that he had been with a year like a fly and never really talked again. He told me that I wasnt like that, that he wasnt gonna do me like that and drop me but thats what it seems like?!?! We had true love and I cant imagine him doing me that way. It makes me sick to think that he is with his friends all the time and they are telling him that he made he right choice and stuff. When we broke up I really went crazy for like 2 days I followed him and made myself look crazy. Im not crazy and have not done dumb stuff like that ever or ever againn but now they prolly think Im crazy but I just couldnt face it. And still cant. He told me that wen we broke up that he would still be my best friend. he would have sex with me if he isnt talking to anyone and we cold still hag out and its been 8 weeks and none of that is happening. He wil text me back but its very short and kinda rude at times. I need help! How could he do this to me after being together so long and around each other 24 7. He did tell me that he misses me not the relationship. I was asking him where he was 24 7 when he wasnt with me, I would get upset mad and jelous even when he was with his friends. We didnt have our own life and if he would give me another chance I wouldnt be that way, I realize what I did. Do you think that had somehting to do with the OCD? The reason I got mad when he was with people is because I kinda knew how he felt so I was afraid he would talk to them about it and they would get him to leave me. Please help me. I dont know if I should find another job or what. Some people tell me to move on but I cant I love him I want him back and I wanna know what to do to get him back. Thanks!