Hi Keyshawn,
I'm glad that my similar experience can help with yours too. Thanks for sharing your previous experience.
As you know, I'm not really experienced enough to be able to give you advice on what you could or should do. However, I do know from what I've just gone through that, no matter how 'special' you think the girl is (I had thought like, 'oh this one's special cuz she really likes me'), that if you go out of your way to accomodate their interest (ie initiating everything, being the one doing all the work, and generally just turning goo-goo ga-ga for her, tring to impress her, etc), that she'll just lose interest in a snap. Literally. Like, with the girl I was after, I think she lost it over a week of my actions, but her reaction and attitude changed on the surface, literally, OVER ONE NIGHT. She doesn't even bother being friendly at all, over IM. Its like, stonewalls me with one-liners. Immature freshmen
It doesn't matter how much she likes you now. It could all change very very fast. Be aware, and that doesn't mean suck up to her extra. It actually means distance yourself a little more sometimes, 'try' other girls out, and yeah, don't fall prey to the tunnel-vision I got. I know its hard to believe, but once you've gone through it like I did you'll know what I mean (I hope you won't have to though).
Regarding what actually happened between the two of you, I think that its a very very good sign that you guys 'slept' in that position. That has to mean she's very comfortable with you and wants something a little more intimate. Again, from my previous experience, do NOT let this sign get all into your head, and don't let it make you become goo-goo ga-ga and become a total wuss to her. Wuss is not the traditional wuss, more like what I quoted above from David DeAngelo: Doing everything, trying to impress her (you might try this as you flirt more and she doesn't respond, you won't know what to do so you'll say things to make yourself look good. I know I did, don't make that mistake), and etc.
All the best to you, I hope it works out,
Match
EDIT: One more thing I wanted to say is, you are also a college freshman. I think its great that you already 'got it' and are trying to go after girls (I didn't up to now because I was concerned with grades). You have plenty of time, so take your time (not necessarily regarding this girl, but in general), you are not in a 'rush' like I am.
EDIT2: Also, I kind of fell victim to the whole 'oh she really likes me, she's so special' thing. Ask yourself, do you *really* like her? Or are you just talking yourself into it because she showed interest alot in you first? In any case, I think trying to start a relationship on the first girl that showed interest is also really bad (which is what I tried to pull). Of course, I had talked myself into and ended up liking her alot, as you can tell... I guess just another thing to think about.