<human>: My boyfriend and I have been together for six months, and started dating during our first semester of junior year in college. He's great and we have tons in common, similar majors, and seemingly similar life goals (to the extent to which we've talked about them in our six months together).

The problem is that I just can't shake the feeling that we're going to break up due to circumstance after graduation. I'm absolutely terrified that all the fun we're having now is going to be ruined if we get jobs in different cities this time next year and that we will obviously have to pursue our careers instead of a relationship that will be, at the time, only 1.5 years old. 

We're going to be apart for the summer, (we're from vastly different parts of the country) and both working, but have decided that he will visit me in my city (Northwest US) once and I will visit him in his city (the South) once. I think part of what is making me anxious about our relationship is that that will be at least a $300 trip for me and I'm afraid that I will regret spending that much money in the future if we do break up.

Reddit, do I stay in this relationship because I really care about him and want this to continue? Or do I end it now before our investment in the relationship increases?

Can you give me a shortened version of the text?
<bot>: I'm terrified that my boyfriend and I will break up when we graduate from college as neither wants to hold the other back from a career. What do I do?