What should I do?

I used to have a crush on my boyfriends brother. I never acted on those feelings because he had a girlfriend so I never flirted with him, only kept it a casual conversation between really good friends. Then I met his brother (my current boyfriend) about a year later. I started hanging out with my current boyfriend & ended up liking him & wanted to give our relationship a shot so we started dating. I am still friends with his brother because we’re still good friends. We’ve been dating 7 months so far. We broke up once for like 2 hours. I had told his brother about the break up & were really close so I can tell him everything, he’s like family to me. I told him how I used to have a small crush on him because I thought it was funny etc. I didn’t tell him that because I was trying to get with him since I was single during that time. I told him as a friend & then an hour or so later, I got back together with my current boyfriend. Now I don’t know if I should tell him that I used to like his brother. Personally, for me, I don’t think it’s such a big deal because I never acted a certain way towards my boyfriends brother. I never did anything with him & was only ever a friend to him. But my conscience is eating me alive & my anxiety/overthinking is taking a toll on me. idk if I’m just straight up overthinking or what I should do.