i don’t know what to do

So me and my ex boyfriend broke up almost two weeks ago and i can’t get over him. I just want him back. He was the best thing that ever happened to me and I just feel so alone now. Everything I do, I think of how much better it would be if he was there. He ended things because he lost interest and I blame myself for not putting more effort into the relationship. I dont know what to do apart from just cry. I decided to remove him from Snapchat last night and he didn’t even text me or anything to ask why? I don’t know what to do, please give me advice on how to get over him