His girlfriend doesn’t like me?

My boyfriend of 10 years has a girlfriend. Me and his girlfriend used to be friends, but she randomly on added me from everything one day and started acting weird. (I don't know why) . she makes a lot of trouble when we’re on the phone, and she even is weird to him about me when i’m not there he said. he doesn’t stop talking to me but the problem still stands. It’s just a little weird. What should I do? Why doesn’t she like me?
His girlfriend doesn’t like me?
Post Opinion