Just like you don’t know what’s going to happen while she’s away, she doesn’t either. 😉 I think you should tell her that you’ll miss her and you can’t wait to see her when she comes back, and try to be in touch while she’s gone. But it’s too soon in the relationship to make promises to each other, and those promises aren’t really full proof anyway at this stage in a relationship. It’s best to accept that she’s going to be away over the summer, and that you’ll be able to see her again in September. 😉