Im 44 and I'm totally in love with a girl who is 21 we have been together for 2 years and just decided to move out of town and will not even talk to me. Im very hurt and confused. I want to be with her and she told me she wanted to be with me. I don't know what to do I don't want to chase her down and nag her to find out what's happening but I also don't want to be without her. I've not hardly slept or ate anything sense this happened and its affecting everything about my life right now and I'm scared as to some of the feelings I'm having

It is called, you have been dumped, so you don't get any closure, mostly they lie anyway, and just say, they need time or space

You suffer and move on, She was not mature enough to tell you it was over, for some reason, so does it really matter why, accept it is over and move on with life.

We all have been through 'I don't want to be without' her or him.
You get through it the way we all do - you suffer until enough time has passed while keeping as busy as you can.

You met her when she was 19. It's a miracle that she lasted two years at that age. Teens and early 20s are changing constantly. It won't do any good to chase her down. As said, she will probably lie so as to not hurt you. She may have someone else. She may just want more people her age around her, doing things young people do.

Please tell us the feelings you are having that are scaring you.