<human>: Can you provide a brief rundown of the text in within 3 sentences?

I don't think i need to make this story too long.  We've been dating for three months and now she's going to be gone for the entire summer as she travels around the world.  We have been really open with each other (which has been awesome) and we both want to keep talking but don't want to stress the situation too much.  I just need some words of encouragement that everything will be ok.  Sometime I feel great about the situation; it will be some respite and I'll get a fresh view and see how much I really care about her.  I don't want to be that obsessive boyfriend and I don't want to wallow in sadness, but thinking that she'll be gone for sixteen weeks is hard to cope with.  

I don't want to just break up with her because we get along so well that seems too aggressive.  I've accepted that I won't talk to her all some days (maybe even weeks because she'll be in remote areas) and at times it'll feel like we don't even know each other

The emotional rollercoaster sucks and I'd just like to hear any words of advice that you all have in dealing with this.  Thanks!
<bot>: my girlfriend is leaving for a long time and we've decided on a fairly open relationship.  How do I cope with the sadness of not being with her and the anxiety that something will go wrong and this is the end?