I don’t know what to do

I just found out by my best friend that my husband has been texting her behind my back some is normal converstaion but he also send her messages asking her what shes in to and to send her nudes to him and i know he plays around sometimes but he also sent her messages that he deleted and she sent me pictures of them and im so hurt and upset and when i confronted him about it he said yea that he did but that he never cheated on me and that he was doing this to get back at me cause i havent been cleaning or cooking and thats beacuse 2 years ago i lost my dad ive been depressed since then i got pregnant 4 months after my dad died i had my baby in june 2018 and ive been fighting with my family members and ive been depressed and eating alot and just down all the time and he said that he loves me and he doesnt like her he was just trying to get back at me and that broke my hurt even more and he even texted her on jan 31 asking her that if she would of been single would she have given him a chance what the hell is that i mean he says that he doesnt like her but he asks her something like that he deleted her off his phone and said he wasnt gunna talk to her anymore but now hes mad cause she told me and calls her a bitch and he says shes envious of me and that if she didnt want to ruin our marriage she would of never told me