Hi! I've never had huge problems with getting girls, however the situation I'm facing right now is new for me and i think some advice would be appreciated.
So a few weeks ago me and a girl from my college that i have known for about four months ended up sleeping in the same bed after a party at my friends house. We hugged for a while and as i tried to kiss her she said that she couldn't go any further because she had some unsolved things with another guy (not from our college). We still slept together and she didn't stop being interested in me.
Now after few weeks i feel like this relationship isn't moving anywhere. I don't know if I should just wait or make some kind of a move, like asking her about her feelings. It doesen't make it any easier that school is basically the only place where we see eachother.
I've had some one night stands with other girls to see if would help me forget her but it hasn't worked, she isn't that popular or good looking but somehow I just can't stop thinking about her.

People might say "Go sleep with 10 more girls", but I stand on a different point on this.

If you're happy with this one, try to do your best. The whole point is to be happy, isnt it?

However, DO NOT ask her about her feelings. She'll just analyze it and will think its more complicated. Plus, with you waiting for an answer it's likely to create a whole lotta pressure on her, and you dont want that.

Here's what I'd do instead: Invite her over to some place. Remember to embed the "I'm already going to be there, and it would be fun if you joined" message. My intention would be to raise the kino to that last point when she had a resistance. This time, when she says it's complicated and she shouldnt move forward and shit, use just a slight negative body language. Increase the space between you just a little, keep fun and smiling. And then kiss her cheek. Ask her if this made things more complicated and smile. She'll probably say no or stay silent. At the worst case, you'll see a little smile. Then say "Good, didnt think so. How bout I try the other cheek?", and kiss her other cheek. "How bout now?". And probably the same thing is going to happen, you get another smile.

Just make her feel like you're ok with laying back and stopping kino, or kiss closing her. If she doesn't know which one you're more likely to do, it's gonna work on your favor. Don't surprise her with kisses, give her just enough time to stop you if she wants to, but dont dwell on it for too long and look shy.

Ask her stuff so she questions the situation, make her think "This can't be so bad now, can it?".
Keep it fun, not too much fun but fun. Keep your smile on and push and pull gently.