<human>: Can you condense the text into three sentences or less?

I'm a little conflicted about this issue.

Backstory: A month ago my boyfriend left for basic training. We've written letters and talked on the phone once. Before he left we've been together for almost 3 years. About 7 months before he left, I recently got hired at a retail store. At this job, there's this guy named Mark. He's slightly older, but a nice overall guy. 

Here's the problem, it's clearly obvious that Mark likes me, but he doesn't cross the boundaries. Mark has met my boyfriend before and they had one of those awkward hello's. I like Mark as a friend, nothing more. He recently asked me if I'd want to go see a movie with him, since I've been talking about this movie for months. He knows I don't have anyone to go with, seeing as how my bf is gone. I'm afraid if I go, he'll pull a move on me. I already feel guilty and I haven't even said I'd go. If I do go, it'd be the first thing I've done since my boyfriend left. He was my best friend too, and the few other friends I have don't live close, so I can't hang out with them. If i do go, the drama is going to start at work again, and I'll feel guilty even though I have no feelings for Mark. 

So, should I go to a movie with Mark or not?
<bot>: coworker asked me to a movie while my bf is away. I feel guilty. Should I go or not?