My husband (m/32) cheated on me (f27) during the most vulnerable and dependent time of my life and I don't know what to do.

I just started nursing school, we have a small child and I have taken on his daughter fulltime for the past year. I just found out he was visiting "massage parlors" and even joined a website to find/review them.
I'm appalled, disgusted, heartbroken, ect. But the real issue is now, what the **** am I supposed to do? Last year I quit my job and moved 2,000 miles across the country for his job, I took on an extra kid full time (BM abandoned their daughter with us and became a drug addict, my stepchild is diagnosed bipolar and severely traumatized). I started working two jobs when we moved to make up for the decent salary and comfortable position I left behind. THEN I got into nursing school (something I've always wanted to do) which is supposed to be beneficial to our family. He agreed to take on extra financial responsibility in our home while I went to school, so I quit one job and went part time at the other, AND THEN HE CHEATS ON ME.
Two months ago I could have been 100% self sufficient and move the **** out to be a single mother. Now I'm so ****ed.
He wants me to stay in the home with him and he will continue to support me. But I've made it very clear we are over. We have split up in the past, and have been going through a lot of issues. He doesn't treat me right and I don't deserve this ****.
I dont know what to do.
TL;DR My husband is cheating on me. And I just quit my job to go back to school.


Source.