Advice???

So my sons father is in jail and I live with my mom but it’s getting cramped with 4 dogs my mom sister and son to be uncle living there. Also do not get along with my mom at all. I found apartment for just my son and I for good price so I don’t want to pass it up and also want my own home for my son. My sons father said he won’t be with me or trust me if I get apartment while he’s away and I’m only getting apartment to hook up with guys. Which definitely is not true he’s just not ok with me living alone but I am 21 and don’t want to pass this up I want my son to have a home I feel like that’s what’s best for him and I. What would yous do in this situation?