Well I'm interested in this girl, but as the school year (I'm a freshman) comes to a close I will be gone for a large part of the summer, including off the bat ~3+ weeks. So I'm split between going for her now, the attraction is there and has been for quite a while and I'm sure I can be with her now, or wait and try to respark it later in the summer or something. Any recomendations? Would me being away shortly after it began be trouble?

I want to make it last when I get with her, because while I can certainly get girls, many besides her have me absolutely bored, while she's got a good combo of looks and personality.

go for it now!

then she will have greater reason to go for you again after the summer... she will have already invested her time and energy on you so it will be easier to get back when you come back.

Exactly, if u snag her now, you will be in her head when u are gone

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--Brad

Go for it bro, i don't see the problem here. Just try to make her yours
before some other dude comes along. Tell here you are going on vacation she will understand. Just promise her you will keep contact Take your chance before this window of opportunity closes on you.

By the time you typed this, you should have already made your moves. Good luck.