Am in love with a married man

i met this guy some three months ago.i wanted him to be just a friend but we have become close everyday and we are now having an affire even sexually. i love the guy very much and so does he. the problem is that he wants to marry me, but he is also currently married and has a family. he says he is going to file a seperation with his wife to be with me.

i am currentlyl eaving with another man who we have a daughter together but we have no legal marriage documents with him. whenever i try to ask we formalize or do a wedding he is realy not ready for it. he keeps telling me somethings dont come in his mind like having a weedding.

what should i do.should i leave this man am leaving with and have the other man who is makiong me happy and treating me like a queen? all that anywoman needs?

please help.