Am I doing things wrong?

For starters, my boyfriend (M18) and I (F16) have certain boundaries and one of them is no "private" talks with people of the opposite gender. We have had a few discussions mostly because I had lots of male friends (note that I never had something romantic going on) in the online game we met before we were in a relationship. I eventually distanced myself from all of them pretty quickly since my boyfriend comes first. At this point I always play alone and I've been getting tired of it because he doesn't play with me anymore, so I recently have been looking for female friends and tonight I thought I had found one when I saw this person's skin (big mistake), so I offered teaming up THINKING this was another girl like me, and yes I found out after a few games that this was a guy. 😭 Honestly I didn't want to be rude so I kept playing and everything was completely normal, he asked if I had Instagram or discord, and I ended up adding him on discord. Luckily, my boyfriend and I have matching pfps and descriptions so it is noticeable that I'm in a relationship, but I'm still feeling guilty and I wonder if I should cut things as soon as possible with this person to avoid problems in the future. Apologies about my English. :')