What advice can you give me to help me deal and heal with this situation?

I have been married for 2 yrs and my husband is 32 and I am 31 and we have a 2 year old daughter together. We seperated or he left 2 months ago because he could no longer deal with me not trusting him. During our 2 year marriage he spent the night with an old sex buddy after starting a fight, hid womens numbers in his phone, I read countless inappropriate sexual messages to other women, I found pictures of his dick on his phone, he took me out to bars only to spend half the night with his arm around other women whispering in their ear. I attempted many times to explain to him that his behavior was disrespectful to me and to our marriage and it was hindering my ability to trust him, only to have him respond with anger that he was doing nothing wrong and I needed to get over it. When he left he moved in with his mom, he has sent me text after text blaming me for us not working even though I still wanted to work it out with him and go to counseling. He recently moved in with a 19yr old girl we both work with and I had to find all of this out from patients I take care of and staff I work with. He says he was never in love with me and he is happy with her. What gets me is our 2 year old is around all of this when she goes and stays with him at her place and how can a person be so cold and uncaring to do such things. I am having a tremendously hard time dealing with all of this because I was truly in love with him and I would like some advice or suggestions on how to recover.