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.