Ran into my vacation crush

Let me backtrack... so awhile back on a girls trip, I met this really cute guy & his friends at a fair where they invited us later that night to their Airbnb bc they were having a party(mostly an excuse to have us over). There him and I were hanging out, talking n such which later led to hooking up in his room. Girl when I tell you it was the best sex ever... like I still think about it to this day. After that we stayed in touch even though I live in another state. He would message me every now and then asking how I am, how he wished we had more time together, complimenting my post, and even wanted to plan another vaca together(never happened bc I chickened out). Anyway that went on for I think 5 months. Fast forward now I just moved out of state for college(where he lives). I never told him that I was attending college out of state especially his. I guess I didn’t want him to wait for me? My plan was to focus on school & my career out here.. I didn’t want a boy getting in the way. Anyway, my friend from college asked if I wanted to come with her to this friend of a friend’s house party which I said yes bc I didn’t have anything else going on. Guess who I saw as soon as I walked in... THAT GUY like what are the odds🤦🏽‍♀️ I couldn’t do anything bc he was with a girl. But the entire night he kept making eye contact with me & wanting alone time. One major part of that night: I was kinda tipsy & needed a breather so I sat outside the patio ALONE. As I literally sat down...he came over & got really close(I could feel his breath, body warmth, everythingg). I was like are you kidding me... all night I tried my hardest to avoid him & here is looking all handsome & up in my business. I wanted to kiss him but fought the urge not to bc obv that girl he came with. The worst part is I have to see him again this weekend for my friend’s(that girl from my school)birthday. Girls what do you think I should do?