My new girlfriend is not hanging out with me and then she is going to leave for a few weeks , I need help?

I never had a girlfriend and I went to a buddy's party last week . I went there and said eh , ok I won't sit and hope that a girl may finally be interested in me . So I got a few beers and just started to talk to random people , I didn't care , I just wanted a party with my friends . Now I can't remember how I got to talk to a girl . The thing is that after 2 hours of talking we couldn't stay apart . Later on we cuddled on the couch and tried to sleep .. eh who could have done that with speakers roaring at 100% :P . In the morning we where holding hands and we didn't seem to be shy or something it was an awesome feeling . Later she had to leave , so I walked her to the gate and right before she left we kissed. I got home , I said that I will not message her right away to seem desperate . I asked her the next day if she can go out but she said no , because she went out with some friends . She said that she has a free day in the weekend , but right before I was ready to walk out the door a god dammed storm that lasted all day appeared. She has to go to a party sunday ... so I am kinda scared that she will eventually just ignore me. We will see each other next week but only for a day , she asked me out this time so I wasn't begging . The problem is that she will leave friday on a 2 week trip and I for 1 week trip .. no idea how to guarantee that she is coming back to me. Details: I asked that friend if she said anything about me and he said that she doesn't know if we are together but she really wants .. apparently she is not trying to get rid of me . The thing is that she isn't allowed to go out after 6 or something like that , I understand that and I don't blame her . But I just want some tips to make this work , we talked every day since then but , now for example I am kinda paranoid about that party and so on ..