Cheating advice

To give a little backstory -

My partner of 5 years on my second pregnancy for the whole pregnancy used numerous dating sites, only fans, webcam girls etc. One was actually a girl I knew and for weeks he was asking her to meet up with her for sex and even offering to pay her.

He would also send girls chats like “your boyfriend best take care of you because you are so hot” “if he isn’t taking care of you let me know” this was as recent as a week before I gave birth.

I forgave him but then he went behind my back again and tried messaging another girl and hid it.

Everything he seems to say is a lie. I asked for complete honesty about anything else which he said there is nothing yet tonight I find another app full of women that he’s stalking.

I’m so torn because he keeps blaming depression and saying he’s feeling low but I can’t keep doing this anymore.

I don’t have any friends to turn to (due to him) we share a home and we have 2 children I just feel so stuck

Any advice?