<human>: Can you summarize the given text in a few sentences?

My girlfriend an I started dating 4-5 months ago. I felt like I was head over heels for this girl. Now she is on an internship out of town for 2 months. I just visited her for the weekend, and had a good time, but something felt a little "off" and has for a week or so I guess. 

A bit of background: We're both about to graduate with our Master's degrees and will be moving after school. We don't want to do long distance. It's quick to be making life adjustments for someone you haven't been dating long, but at the same time, if we think our relationship is worth pursuing, we have to consider it. 

I think I'm just starting to freak out a bit about the seriousness of this while she's out of town at the same time. Other than this, she is fantastic, great for me, my family loves her, no other issues to speak of at all. I'm trying to figure out what exactly is going on with me and what to do about it.
<bot>: My girlfriend is out of town for a couple months right as our relationship is starting to get a bit more serious and I'm kind of freaking the fuck out.