I see,

Well I think the issue is larger than this one relationship with this one girl. If you're really feeling this way, even if your issue turns out in the BEST case possible for you and she decides that she would like to give it a shot. In less than 3 weeks she will be 3 hours away at all times. This means that your source of happiness, essentially the basket you've put all your eggs in is 3 hours away, how happy will you actually be? You see how the problem isn't really solved by the solution?

Additionally, the first few months of college are a unique cocktail of initial freedom, independence and being around new people. It is not unnatural for the idea of being tied down to just seem entirely counter-intuitive during a time where you are being given the first tastes of freedom.

You've also said that you've only been talking for the summer, so it is entirely logical that enjoying the summer together and then simply regressing to friends when she goes to school is in her eyes favourable to starting a heavily committed relationship and immediately factor in the complication of long-distance and if it all goes wrong be subjected to a much heavier and heart-wrenching break-up for the pair of you down the line, do you see what I'm saying?

I understand that to you, this feels like rejection, like you are somehow not good enough because if you were, she would want a relationship with you. But she's not looking for a relationship. She is however talking to you and sleeping with you, I'm assuming you guys hang-out? You said it yourself you are into the same things, that seems to be a good foundation for a truly amicable friendship.

This is the opposite of rejection on her part. You are absolutely crushing it dude. You said it yourself she is out of your league, but apparently not. What you need to do is just drop the relationship thing and worry about enjoying what you have while it lasts. When she goes away, I would try to focus more on yourself and less on her for the fall at least.

I don't want to presume as to your situation or what you do re: mental health but I am personally of the opinion that sometimes it is as simple as someone to talk to. Regardless you need to find out how to direct some of the love that you are attaching to her onto yourself. Start working out, start a hobby, focus on school/work/etc but as someone who has been there it really is what you need to do and just get to the root of the issue.

Hell if you put in 8 months of hard work on yourself September-May you'll come out the other side as someone who makes yourself happier than anyone ever has, and added bonus she will be back in town for the summer!

Also as a bonus she'll be back in town, but she won't be the sole object of your affection/focus/source of happiness etc.

Also if you ever need a general ear about anything just pm