So my boyfriend's ex follows me on Instagram. I don't follow her because why? Also, his mom absolutely adores her and hangs out with her a lot which is kind of weird to me. I had to meet her once because his mom invited her to his surprise college grad party. Anyway, I don't think she needs to be around anymore and the other day I get a notification saying she liked one of my posts on Insta -a photo of my boyfriend that I posted. She's done this before if I post a photo that's only of him, she will like it. She doesn't like any other posts of mine except those. Wtf right? Am I overreacting but I kind of want to block her?