How do I get him to get back with me?

You don't want a guy that is on and off. Stick with a guy that can stick with you. Age has nothing to do with it. I don't know what you did wrong because you didn't explain anything.

Well if you've been on again off again then he is really not worth your time. Get over him
you'll find some one way better.

Can't really tell, haven't mentioned what U have and haven't done,there is this book called: Catch him Keep him by Christian carter (if i'm not miss spelling :p) that might help U

Get over him as it's not worth the heartache and find someone else. He is the selfish pig I say!

Don't try to get him back because that's pure wrong what he did!

I'm going to tell you that you didn't do anything wrong and if you act like you don't care and if you want him back he will come back to you if you show him you don't care..

You said that you have been on-and-off for 6 years. There obviously was a lack of commitment between the two of you. Therefore, when someone else came along, he decided to look for greener pastures.

There is no way we can answer your question with such little information, I'm sorry. But, don't think of it as you doing something wrong, just think of it as not meant to be. Get a fresh start!