She still loves me but is marrying someone else.:'(

great, I think so, I also agree with you, that is the best solution, maybe the pain will only happen for a short period of time, but will end. And a good future will come.

She's married now so you should take your step back. It'll ruin three lives. And I think you should take some time, you'll get to know many girls. But take your time and start talking to some people. It isn't like you cannot love anyone else except her but I think you can't love anyone in the same way you loved her.
So that's fine. Over the period of time everything will get fine and next time you'll be more aware of such crap.