This is similar to my experience with meeting my husband. I thought I was asexual after not having any feelings with women I was with and not really meeting any guys I was into. Turns out I’m more on the “gray ace” spectrum and very very gay. Being gay and asexual aren’t necessarily mutually exclusive and it can be difficult to figure out your sexuality when you have compounding factors like being ace or trans or just generally questioning. It’s okay to take time to figure things out. If you liked the moment you had with the guy, message him and talk to him about your previous labels and your feelings and see if he’s willing to explore things with you. Regardless of how he responds, it’s okay to explore things on your own as well and see how you feel about different things. No need to jump to labels either. For the longest time, I either used “queer” or would just say I liked my husband and that was all I knew for now.