so today is my bfs birthday. well his ex girlfriend texted him & told him happy birthday. he replied then she replied. well he told her it was nice to hear from you & all that stuff. I told him how I felt about it & he keeps getting all defensive saying well you do what you think you need to do & all this stuff. I told him that If he absolutely doesn't want her texting him then don't reply to her at all & maybe she will get the hint. when we first got together in 2013 he texted her for about 6 months & I finally put my foot down & told him that it was either her or me. & I keep telling him it's just gonna end up like it was last time he keeps saying no but I have this guy feeling it will continue then he will be mad if I say something to her. I'm stuck. idk what else to do. he wonders why I worry all the time. & his mom doesn't make it any better. she doesn't respect out relationship. she's the one that have her his number & told her to text him. I'm upset. I told him to put hisself in my shoes. he said he would be upset to.  Am I overreacting????