Betrayed and upset

My fiance has been caught many many times on dating sites, Craigslist, whisper, etc, talk and sexting other women. He swears he's never actually met up with these other women, but to me it's the same. I feel betrayed and hurt, especially since he's done this since we found out we were having a baby. He even uses our daughter in this, send these women pictures of her, talking about how hard it is to be a single dad. I just needed to vent, I really don't have anyone to talk to about this.