I don't think that you not being married really has anything to do with you not getting posts.

DB'ing can be done in almost any situation. Work, dating, marriage... whatever.

The main question that pops into my head when I read all this is..

Is this really what you want or are you just "loving" who he was back when you started dating?

Separate yourself from the situation as much as you can and really think about the answer you might post.

Second question would be...

Is him cheating a deal-breaker for you?

This must be a yes or no answer. Understand the choices behind yes or no.

Lets start with that.

Relax
Eat
Think
Act normal
React.. Smartly.
Do something different.
Emulate.
Do Work.

Lets get "RETARDED" in here.