Re connecting with ex

I’m currently in a 2.5 year relationship with my boyfriend (23) and I’m 21.

A few days ago my long distance ex from 6 (he was 18, I was 16) years ago followed me on IG and in shock I DM’d him asking how he was doing because i thought he was wiped off the face of the earth since we broke up. We talked for a bit and he asked if we could catch up over dinner. I said yes because it is just to catch up and I made it clear I have a boyfriend and do not have intentions of rekindling any romance. I told my boyfriend that my ex asked to hang out and I said yes but I of course wanted to talk to him about it and my boyfriend mentioned that he doesn’t want me to but to go ahead and do whatever I want. I can’t help but feel bad but at the same time, I know what my intentions are. I don’t have any motives besides just catching up and honestly, I don’t want to see my ex again after it cause it would be weird to stay in touch. I just feel like it won’t hurt to hang out once after it’s been 6 years. We were literal kids back then and now we’re adults doing our own thing.

I know me asking if it’s wrong to reconnect with my ex just this one time might make it seem like I feel guilty but I honestly don’t feel as though I should be labeled as a bad guy for it. Can anyone else give me their opinions on this or if you’ve been in a similar situation.