You’re both right.
You shouldn’t dictate who he can or can’t be friends with. And…. you shouldn’t date someone who continues to see a female friend who appears to be more than just a friend. Ideally, he would put you first and foremost, and not want to upset you. That he puts his relationship with this other woman ahead of what makes you feel comfortable indicates that his relationship with you isn’t really ready for a successful marriage. You probably already know that, which is why you’re trying to control his life by dictating his friendships, his phone messaging, etc. When people don’t get what they want in a relationship, and it threatens them, they start acting controlling. The controlling behavior becomes the subject of fighting — instead of the reason for the controlling behavior.
I think you should accept the fact that he’s into his relationship with her more than his relationship with you. It’s disappointing, but if you don’t take a breath, lean back and really see what’s going on, you’re going to have an unhappy marriage. 😳