The reason I ask is because I'm not sure it's even a viable worry, but I can't shake an uncomfortable feeling concerning the situation.
Last year I experienced an instantaneous attraction to a guy I'm working with, though it never grew to any intensity because I was head over heels for my boyfriend. In fact, the very point that it didn't grow further because of my feelings for my boyfriend only solidified our relationship in my eyes.
However, a few months later my boyfriend left me to go travelling for a while, and it just so happened that I was put on an intense project with the guy at work around this time. I was missing my boyfriend and eventually concluded that the reason I was thinking about this guy so much was only because of this very reason - so when my boyfriend returned, I put the guy out of my head and continued to have a great relationship. I thought I was cured.
But several months on, it's worse than ever. We began to send personal, but not flirty emails to one another when outside of work, and my heart accelerated so fast in his presence that I couldn't bear to be near him anymore - at this point I went out of my way many times to avoid him and thus do my relationship good in the long run! Finally I bumped into him when with my boyfriend, and I introduced the two. The next day I was chatting with this co-worker about an event I'm going to that will help boost performance at work, and he asked if he could come with me - I said yes, not knowing how else to respond (also I had initially suggested my bf come with me but he said he might be travelling again). Just as I was thinking about how I'd actually started to miss this guy (since I've been avoiding him), he contacted me asking me to go to another event with him - which he said would relate to the work we're doing.
Now we're going to this thing together, and as he seems a really stand up guy who knows I have a boyfriend, surely it's nothing more than a platonic? I don't want to call it off as it's important to me to go, but I'm not sure how comfy I'd feel about it being the two of us. On the other hand, maybe he views as friends and that's why he asked me to come in the first place? And therefore I should stop freaking out and just have a good time?