"Gay or European" in academia. AKA the hard life of a semi-closeted graduate student in the lab.

Well, this is so frustrating I just want to write it out! I've been semi-out in my lab for about 6 months, after I drunkenly made out with a visiting scholar in my department's party. So far so good, being semi-out made me feel a lot better about myself! However, here is the bad stuff that comes with being "out": I never really cared about finding "the one" because I couldn't. Now that I can, my gaydar is failing me.Every semester, my lab receives students from other countries that work with us for 3~6 months. Some of them are European and VERY nice. There is this french guy from my lab who is really cute and really friendly. We talked a little bit and I got some rainbowish vibes from him, which is nice. But everything can be just my imagination, and I arrive at the most important question since the beginning of time: Gay or European? Also, to make things worse, he is French, and as the song goes:""" Gay or European? So many shades of gray Depending on the time of day, the French go either way """Anyway, this student is REALLY cute, and seems very smart (gay sploosh). Any tips on how can I figure out where he is on the Kinsey scale? Help will be very much appreciated ;)tl;dr Cute friendly visiting student in the area. How to find out if he is gay, without being creepy.