Husband cheated. Devastated

So... we been married 8 months and hes been talking to this bitch 5 months .. and fucked up 4 times... im so hurt... nd im just lost for words... like am i not women enough? Like literally wtf.... been coming home laying with me... this maybe tmi.. but even gave the bitch head! Were trying to work on things... he hasn't stop talking to her... nd im like if u want ur family u need to block her... he says he will always want other women ... nd he doesn't want to hurt me again .. he wanted a divorce but were trying... idk what to do... we have a 3 year old son.. nd 5 years... and we been trying.. i just feel stupid. Majority of my marriage hes been with another bitch!