HELP (past guy popping up again)

I’m in a relationship and I do love him he’s such a good boyfriend and so understanding, good sex, helpful, loyal, one of a kind guy literally ticks all the boxes BUT I can’t stop thinking about a guy I used to have feelings for, I tried to get over him but I don’t think I really have I just ignored it for so long and I try not to think about him but he followed me on Instagram after so long and it brought back emotions!! Its so bad but I find myself trying to stalk his profile when I’m alone & dont know what to do, I feel so selfish and bad. People say if you’re truly in love you won’t be interested In anyone else but I am, I don’t know if I’m actually in love with this guy or the idea of him (not my boyfriend the one who followed me) but we have chemistry and we had such a good connection but I also have a good connection with my boyfriend now, I just don’t know what to do 😫😫😫 I think the bad bit is If I knew this previous guy still liked me I’d want to go for it :( but I do love my boyfriend, it’s gonna sound like I don’t but I honestly do. Head is fried.

(Not my ex just someone I was “talking to” for a VERY long time we never got together due to distance)