Need encouragement…

I’m in a relationship that i know should end. We’ve been together 4 years this month. We have a 1yr and we live together. He has constantly cheated on me. Starting cheating with someone i thought was my friend. Found out he had a baby scare the same year I had our son. I literally have all i need to be done with him but i can’t… he lives in my home. I work 12hour shifts and i literally have no one i can bring my baby to at 5am. I’m an lpn in RN school. I’m in my last semester. I know I’m only keeping him around because he’s my only help with my son. I applied for a daycare and it will be 7am -5pm so that helps alot and he’s supposed to start daycare on Jan 3. But i feel like I just don’t have the strength to end the relationship... i really don’t have anyone I can talk too…