I Loved Someone That Didn't Love Me

He said he loved me.. We were together for three years. I was so much into the relationship, I gave up my family, friends, hobbies, everything. Now 2 days after our 3 year anniversary he broke up with me. A week before my birthday. It has been horrible, I woke up one day and realised I have nobody to talk to. I kept talking to him, being nice. He is just indifferent, having fun with friends, seeing some other girl while I wallow in self pity. I have had enough sleepless nights and crying on pillow to last me forever. I wish I could move on and be normal, but its so effing difficult.