My SO (22M) is still good friends with his first love, his ex gf. SO and I are in an LDR setting (going 2 years in a relationship) and he's currently residing near with his ex and their other friends. Sometimes they'd hangout (with their friends) and despite the assurance my SO gives, I'd still feel uneasy. Ex gf reassures me too. She's nice and sooooo pretty. But I really can't help but feel jealous.

Also, I kinda feel insecure about myself too when my SO likes his ex gf's selfies. I think it's kinda petty of me to feel insecure, but she's really pretty.

Is it still normal if I still feel uneasy and insecure when these happen? Thank y'all for the words in advance, ladies.

TLDR: I get insecure & jealous about my SO's ex gf.