Should I give my cheating husband a 3rd chance?

Last monday I found out my husband is cheating on me with his coworker. I found her phone # on cell. When i confronted him with copies of his phone bill he got mad and said that i am making up stories. I told him to get out of the house so he packed some stuff and left. I called her several times and she finally answ. She said she wanted to meet me to tell me what is going on so I went to meet her. She told me that he told her how much in love he is with her and that he cant seems to stop thinking about her. He also told her how a bad person I am and he doesnt love me and just wanted to be with her. they been taking since aug and talks all day and night long even when I am sleeping he calls her. He claims to me that he loves me and doesnt wnat anyone else but I dont believe him. I just want out of this marriage and want him to leave me alone. We have 2 kids together but I am tired of his cheating. Please any advice or support is gladly appreciated