I won't see my crush in 2 weeks?

I like this girl who might like me (I'd say 75% chances, so a medium sized crush) and we go to college together, and for a reason that doesn't matter I won't see her in two weeks.
How should I act when I see her again?
Will her feelings go away, or go away and come back, or just stay?
I won't see my crush in 2 weeks?
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