Why should I feel like this? Advice pls

Tbh, I’ve never been the type of person who gets jealous or feels insecure in a relationship. But ya’llllll, I am so in love. Naturally, I want everything in our relationship to be wonderful and go perfect. Especially when it comes to each other’s family. Long story short, should I feel some type of way that my boyfriend mother still likes some of his ex’s pics on Facebook. Should I feel some type of way that me and her have met, but she hasn’t sent me a friend request or like my boyfriend and I’s relationship status. This is extremely superficial, social media shouldn’t have an effect like this but girls!!! I am feeling some type of way!!!