Devastated and heartbroken please help?

I've been in love with this guy for three years. I've always been very supportive of him and loving. I got pregnant in the second year I knew him and when I told him he said he was going to dissapear. I ended up having a miscarriage and was devastated. He never once did anything to help comfort me and was already dating and having with someone new from his college.When she broke up with him he called me crying saying he was so in love with her and wanted her back and never even asked me if I was okay. We started to communicate more often after the fact and arranged for me to come visit him, he goes to school in another state. I brought the sonogram with me and a letter I wrote when I lost the baby because I never had the chance to have his support or tell him how I was feeling. I spent 700 dollars for the plane tickets to see him, when I was on the plane he told me over the phone that I was a "*****" and that when i got to the airport he wasnt going to be there. I cried the whole plane ride because it was too late for me to get off the plane and I was headed to another state with no one there or no purpose to be there. I ended up having to stay the weekend in a hotel and just cried. I havent been perfect during everything and I've gotten angry and sad because of the way hes treated me and tried to push him away. I havent seen him at all since having the miscarriage and I feel crushed and so much pain. He recently said he wanted to be with me and that he loved me after a year went by yet he makes endless promises of not forgetting me on valentines day or coming to visit and help fix the past and he never keeps them. As much as I love him and want so badly for things to work out I finally had enough of being let down that I said It was over. He said fine and that it was my fault for not trusting him. Hes always been nice to his other girlfriends and made them stuff and was devasted when he broke up with them...but for me he couldnt care less. I've been crying and caught up with guilt and pain over all of this. I can't understand how he could be a loving boyfriend who treated his other girlfriends like they were the best thing ever yet he treats me so cold and makes me feel like im nothing. ive done nothing to deserve this. any advice or comments would be appreciated