I’m trying not to be an asshole about it, but boy is it bothering me. How does one stop thinking about someone else?

This may have been asked (maybe many times?) before, and in that case I would also not mind taking my post down.

It’s my birthday today, and I’ve been spending the majority of it with my husband, despite also going to work. I’m writing this at work, actually, since I work a pretty slow job. I’m currently in a homeless spot, so his big gift to me this birthday was to get us a hotel (he lives with family right now). I appreciate the gift, despite some bumps along the way. I love my husband, and he is my favorite human by far. We talk for hours every day (even at work), and he just makes me so happy.

However, like 2 days ago, I hung out with another internet man, and this one seems to have left a lasting impression. Normally, I have a good experience, I leave feeling satisfied, I want to see them again, it’s not something I’m jumping to do. We had also started roleplaying when we were texting, and the roleplay just carried on into meeting him. We hung out, had sex a few times, and he let me stay the night since I didn’t have a place to go. I left in the morning.

I want to enjoy the time I’m spending with my partner, but my brain has clung onto the thoughts of this guy. I like him a lot, but I shouldn’t like him so much that I’m stuck thinking about him when I’m hanging with someone else. They’re not really thoughts of “I wish I was with {{GUY}} instead of my husband right now”, but more like “Ah, can’t wait to see {{GUY}} again soon.”.

The guy and I have made plans to hang out again, but I’m overeager. It’s bothering me. I’m like texting about him, texting him about him, thinking about him, checking my phone a lot, etc. it’s annoying. My husband doesn’t know I’m this hung up yet, but he will eventually, I’m sure. I just want to enjoy my current time with my husband without thinking about this guy.

What are your techniques when you’re really overly excited about a person? Could this be a sign that I am not ready for non-monogamy? Am I stupid? Every time I make a Reddit post, I get burned to the ground unless it’s something queer related. I’m (now) 21, autistic and frankly very dumb, so please bear with me.