Break Up

So here's the back story to this: I worked with this guy for a couple of years. We became best friends and we fell in love with each other. But it was always really bad timing for us. Either he was all in and I wasn't, or I was all in and he wasn't. This went on for about a year. A couple months ago we were both ready. Unfortunately I have depression, anxiety, bi polar, and have ptsd from an abusive relationship with an ex back in high school. I had sort of a mental breakdown and decided to drop this semester to work on myself. I told him and he said "I don't really have time for this... Blah blah blah" we started back up again and he said he'd be there for me. Anyways, he lost his virginity to me about 6 months ago and we had sex pretty frequently. Something started changing in him though. He stopped saying "I love you" and he was never around. He has pushed me to trust him and to be in a serious relationship. I was hesitatant because of my abusive relationship. But I trusted him completely and I was so ready to be his girlfriend. Yesterday, he came over and we watched a movie. We had sex and GIRL, IT WAS THE BEST I'VE EVER HAD. It was like something switched in his brain. Afterwards, I told him that I loved him. He said "yeah... you too" I felt like something was up. That son of a bitch dumped me after sex. Like immediately. He said that we weren't working and that he's felt this way for awhile. I asked him what I did wrong and he said "the only thing you did wrong was love me too much." The fuck does that mean? I wasn't clingy, I didn't smother him. I let him live his life. Anyways, I'm not proud of this but I think I might have begged him to stay. It's all a blur. He was my best friend and I loved him more than I have ever loved anything. I'm not angry at him for breaking up with me. I'm angry at him because he fucked me then dumped me. I feel disgusting and ashamed. I can't even look at myself. He spent 8 months pushing me to trust him and believe him. I did and I was burned. He wants to be friends still.