Can I get some advise? - Comments

I've had situations like that, only it was my ex boyfriend and I was dating someone else. I had broke up with my ex for a number of reasons and it wasn't until much later after we stopped talking that we both decided we hated the silence. So we actually got together just to talk about everything and how we both felt. He felt awful about the way he treated me and accepted the fact that I left him for it. He still cares a lot about me but he knows I'm happy with who I am with now.

To me it seems like you two should try getting in touch again, probably better through text and IM's before actual voice until you are both comfortable talking to each other. So Mi Shught is actually very right about that advice, but don't be afraid of the straight forward serious talk eventually either. Let your emotions be heard, even if they are not returned, it is still nice to know that the other person knows and all your thoughts aren't hanging over your head either. You won't regret as much.

I know I've made the mistake of not giving a guy I think I'm in love with a chance to even date me, and I miss him, I let him know.

Well... You can wait until she moves away and see what happens then...

Or, when you guys are hanging out and he starts talking about his current relationship like that again, ask questions that will make him really question it and drop subtle hints that you're still interested. It may be shallow, but sometimes guys can't move on unless they have an escape plan (aka, another girl).
But then you'd have to ask yourself if it was worth possibly being "the other woman" to be with him again.

Also, fish around to see if he's still interested in you before you act upon your own feelings. It could help you avoid getting hurt.