Stay with a cheat or risk never having children?

My partner (33M)has revealed he slept with 2 people at the beginning of our relationship, has kissed 3 girls since and had a lap dance last month. We’ve been together 11 years and he’s incredibly loving and caring to me. I (32F) always thought he was the last person who would betray their partner.

I have been waiting to have children for a couple of years because my partners had trouble holding down a job. When we finally felt like we would go for it (he’s trying a new industry and I’ve built up a lot of savings) I find a charge for the lap dance. When i confronted him and said in anger and hurt I was leaving he admitted all the rest.

I am so scared if I leave that I’ll fall into a deep depression and that it’s unlikely at 32 I’ll find someone I truly connect with in time to have children together.

I feel absolutely in despair. He was my best friend and I told him cheating was my worst nightmare the whole way through our relationship. He still did it to me. He thinks he’s a better man now because he hasn’t kissed anyone for 3 years or slept with anyone for at least 9… but he got a lap dance last month!

Sorry if this is jumbled. My heads gone.