My boyfriend is best friends with a couple who I also adore, the couple used to hangout with my boyfriend and his ex. The ex girlfriend cheated on my boyfriend and put him through hell. So my boyfriends best friend(the male) does not like her or approve of her. But the other friend(the female) likes to hangout with her and also mentions it when we are all together (keep in mind they didn’t know each other before the relationship). Am I being irrational to think like why would you want to ever be friends with someone who would do this to your fiancés and YOUR best friend? Also puts me in an awkward position.. am I being immature to get annoyed with her, and not want to be around as much anymore? (This said ex, also stopped talking to her and deleted her off social media because” it was to hard to see “his new life with me and said couple. Maybe it’s just me but if I was in that position like fuck I would be hanging out with someone who did that to my best friend! And especially when we’re all moving on in life, there getting married. We are having a baby? Throw out the damn trash already like...