Am I wrong for moving on? Now he wants to be an item.. Nope I want to move on.."

We have been dating for almost two years... We have a three month old baby . A few days ago he tells me that we are not "boyfriend/girlfriend" that we are "Very good friends" I said ok i'm sorry I miss understood what we have be doing the last couple of years.... I posted an ad to meet new people the next day. He saw the ADresponded and had my ad removed. Am I wrong for moving on? Now he wants to be an item.. Nope I want to move on.."

"We Met Both wanted a child.. so we started sleeping together.. I started sleeping with only him.. He asked me I told him that I was only sleeping with him... Now I had about three married men that I was seeing before him...He's the first single guy I've ever dated... Told him being faithful is something I not done before but the sex with him was wonderful and wasn't sleeping with anyone else. Haven't and we've been "together" it will be 2 years in November... Now the first year of the relationship I kept telling the three married men that I was seeing this guy and wanted to see what happen.. I wouldn't call them they always called me and each time I let them know I was into this guy.
Now the whole time he keep asking me to stop talking to the other guys and I have..