I should have asked her out, and now it's killing me that I didn't. What do I do?

Anonymous
There is a girl that I know, long story short months ago I wanted to ask her out (she liked me too at the time) but I didn't because some other people talked me out of it. I was really close to those people at the time and thought they were good friends so I trusted that they were really trying to look out for me and I listened, turns out they weren't.

So now, months later me and this girl are still really good friends but I regret so much not asking her out, because the longer we've been friends the more I realize how amazing she is. And now she's moved on is dating someone else, and on top of that we are both leaving to go to college on opposite sides of the country in just a few weeks. It kills me thinking of what could have been, especially because I know there was mutual feelings and I let others talk me out of making a move even though I wanted to. Obviously it's too late for us now, and I missed my chance but the choice I made kills me, how do I move on?
I should have asked her out, and now it's killing me that I didn't. What do I do?
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