Ladies I need HELP

I feel trapped, I don't know what to do. My boyfriend has two kids with his ex, I understand they have to be in contact about them almost all the time; but I have asked him to keep a respectful distance. Today I am away because of my job (in another city) he has been 2 days without me and today he went to lunch with his ex and the kids and then to the movies. He didn't say a word to me about it and didn't answer my text until like 3 hours later...

I feel so betrayed, not appreciated and just plain sad. I don't know if I should just leave or have this conversation about boundaries once again.