<human>: I've been in an LDR with this girl for a while. We currently see each other every two weeks or so, and we're both going to graduate college this semester. She has a very close male friend who she says she has no romantic interest in (and I believe her), though I think it is possible that he has a hidden interest in her.

For the next four years, we will be in different cities (cross-coast), where I will be making the majority of the visits to visit her. In the summer after graduation, she wants to travel with her friend (just the two of them) for a week. They will be in the same city for the next four or so years, so they will have ample opportunity to see each other in the foreseeable future.

I'm also free to travel for a significant portion of the summer, though we know that we will likely be on different coasts throughout the majority of the summer.

I'm worried that this means that she values her friendship with him (of three years) more than her relationship with me. As she has been friends with him for longer, this isn't completely unfair. But I'm worried that I'm going always going to come after her friend in her eyes, especially since we will be long-distance for a long time. I have faith that she likes me, and that if we were in the same city she would spend more time with me. But this particular summer plan doesn't make me very confident in how much she values our relationship.

Can you summarize the given text in a few sentences?
<bot>: My long-distance girlfriend wants to travel with a close male friend of hers after graduation, even though they will be in the same city for the next four years (and I will not be). Should I be concerned?