My boyfriend is still friends with his ex and they text each other a lot. I'm not a possessive person by nature but I think they're taking it too far. Everytime I bring up thr issue with him he says that I'm free to do the same if I want. I got cheated on and lied to very badly in my last relationship so I'm afraid that the same is happening to me all over again. I stay so anxious and worried all the time. He treats me well so I can't even justify my behaviour. What do I do?