Starman,
It may seem like the end of the world, but it's not. There is an eternity of time left for you, and this is one isolated incident. When we advised you not to smother her or be to aggressive, what we didn't say was that you shouldn't put too much importance in the results, because more often than not, friendships don't work out like we think they will.
Always learn what you can from events like this. For example, remember what you did that she responded positively to, and what she responded negatively to. Try to figure out why that happened in each of those cases, and apply that to the next time (and there will be MANY next times.)
Most of all, however, it's important not to let drama and emotion get the better of you. There is almost nothing socially that you can do right now that will have permanent repercussions. Although it's not fun that she hasn't responded the way you would have wanted, this whole saga hasn't even spanned two weeks.
My advice would be to think about how to enjoy the rest of the summer. Get youself a social group. Don't fixate on one person, get to know a group of them. Apply what we've said (in a more casual manner) to get some people to hang out with. The rest will take care of itself.
Capslock