She Turned Me Into a Total Wreck.

I met her when we were 12-13 years old. We fell in love with each other from the get go, and we fell hard. Us being kids we were at the mercy of our parents and we both moved around alot. We would lose touch and periodically find each other again. Through it all we both loved each other very much and knew we were meant for each other. Well during a long stretch of us not being in contact she ended up pregnant and got married. Out of respect for the marriage i stayed away for 8 years. Then one day i looked her up and by luck found her (she had moved many times with her husband). So i sent her an email figuring it may be a long dead address. Low and behold the next day i got a reply. It was her. She had been looking for me too for years but was unable to find me since i too had moved around alot. We started talking and i found out her marriage was over. I ended up leaving everything i knew to go be with her and her 2 kids. I figured this was my last chance at being with her so i took it. For 2 years everything was great, we were in love, it was the happiest time of my life. Well after 2 years she started to pull away, when i noticed something was wrong i asked her about it and she said she was on the fence with us. (just so you know she knew she was loved and important to me, i never abused her either, that wasn't an issue) She went from being clingy to being distant. I much preferred the clingy.  We talked some, i tried to get her to open up and discuss it with me and she claimed it had to do with her hormones (which were out of whack according to her doctor). We agreed to work on the relationship. That was a year and a half ago. I thought we were getting better and one morning out of the blue she told me (with out any emotion i must add) that she doesn't love me and i need to leave. Didn't give me a reason why, wouldn't talk about it, wouldn't try and maybe save the relationship. No, i just had to go. She told me she wanted to remain friends and to keep in touch, which i wanted too. It is now a month after i moved out (i even left the state since there was nothing else for me there) and 2 weeks since i last called her, so i give here a ring to see how she is doing and she tells me this. " I am with someone now, and i never want you to call me, email me or contact me ever again. Lose my numbers or i will change them." She apparently is already in a serious relationship with this guy. She went from loving me very much to talking to me like i am scum of the earth. She made it clear she doesn't car if i live or die. I can't understand this since we both thought we would be together forever, we loved each other soo much (i still do love her, she was my world, and i used to be hers), and now she wants me out of her life forever. I did nothing but love her, and when i ask if i did something to hurt her, to make her feel this way she just gets angry with me and won't give me an answer. It has destroyed me that she is like this and doesn't love me anymore. It was always important to me that i was someone she could be proud of and be in love with. Apparently i failed miserably and i feel worthless, i feel like i don't matter, i feel like i screwed up but i don't know what i must have done. I feel like i am not worthy of being loved and will never find love again. If i couldn't make it work with her, with all our history and love we shared, then i have no chance with someone new. I am a total wreck.