Search Results: why would she act that way

So, I believe this to be pretty obvious, but I reconnected with someone I went to high school with. We live far away from eachother now, but I'm moving back to our hometown soon...
We text on and off all day everyday since reconnecting. Like 3 weeks ago...
Its gotten pretty flirty even steamy. (usually when one of us has been having a few drinks lol)
He's very difficult to read. Only really opens up after a few beers, but kind of seems like he acts way more interested then. I asked him once why he's difficult to get to know and he said he's just quiet. So it's an ongoing joke about him needing beers to open up.
Is that a red flag? We have chemistry but it rarely is noticeable when he isn't drinking. He's said it's kind of a shy thing but worries me. We both are adults and he certainly opens up when he's buzzed.

Things were going well with this guy, until a particular day. It was a formal work event (we work at a school), and we'd agreed to attend it together and especially be with this one student whose parents usually don't show up to events. We'd talked about taking the family photo together and being there for the kid. But, when the day came, a hundred emotions and thoughts flooded over me, including this being my last day with the kids, and I didn't go to him. He'd also texted me asking where I was, and I didn't notice till later. After all the speeches, I was crying and went to the ladies room to clean up before seeing him. But when I got back, he was gone. I found him at his work desk, working. We exchanged very few words. Eventually, he went home. The other day, I dug deep into why I'd acted that way, and I figured out it links back to my childhood- my dad left. On grad day, I had this image in my head of my crush, the kid and I taking pictures together. But the kid's trashy dad showed up unexpectedly. I think this was one reason I avoided my crush- our plans to take the family photo together was destroyed. A few days ago, before I started reflecting on all this, I tried to ask him out but he said he just started seeing someone. At first I confessed my feelings via text and then tried to say goodbye, but he asked to stay friends. I said no. Later I changed my mind and apologized for being dramatic, because he's work partners with one of my mentors since high school, and I don't want my issues to affect their partnership. He said we were cool. Two nights ago, I watched a movie he would also like, so I texted him about it as an attempt to smooth things out as friends, since we used to talk about movies. He isn't replying. I don't know if I should give him space or talk to him about graduation day. All I know is we can't move forward in any direction if he's still upset. If we were to never see each other again, this wouldn't be so bad but we probably will.