Stay at home mom

I need some advice , I’ve never been a stay at home mom ever . I’m a mother of 3 I just recently had my 3rd baby about a month ago . I’m 24 years old ever since I was young about 15 I’ve always worked I never once stopped working even while being pregnant I worked until I had to give birth and would go back to work 3 weeks postpartum. I never liked to depend on anyone or ask anyone for anything. I was a single mom of my first 2 for some time and everything I had I took care of it all by myself I had a car , my own apartment and a good job . I met my now boyfriend and I moved in with him and his kid . So well all live together now . I had to quit my job bc of my schedule i worked all day . So then I worked a part time job he supported me while that happened. I ended up getting pregnant and I still was actively looking for a job . I was not making as much money as I was before and ended up earning about minimum wage . I still did not like to depend on my bf . I had 2 kids which I did not want him to feel like we were a burden . When I was about 7 months pregnant he encouraged me to quit my job and said he would take care of the bills . He was making decent money to pay all the bills on his own . Even while unemployed I still tried to help out somehow I got food stamps and I get a huge amount so he didn’t have to worry about groceries. When I gave birth to our son I applied for WIC so he didn’t have to worry about buying formula. He recently got a new job and is making a lot of money . My main concern here is that I don’t have any money for myself. I go out and have 0$ all the time if I wanted to buy let’s say a coffee I can’t bc I don’t have any money . I’m a bit upset bc he spend money on himself we are not married but we are still living together and I do all the duties of a sahm. I cook and clean after everyone I raise all the kids and I don’t have any time for myself at all . He takes me out to eat sometimes and ofc buys me stuff on birthdays and anniversaries but I’m not sure if I’m in the wrong for expecting him to want to give me at least a bit money for myself to have just in case . Am I being selfish ?I need some advice I also don’t know how to bring it up to him he asks what’s wrong and I just don’t know how to bring it up to him . I have to ask every time I need something like necessities for gas etc . Idk if I’m being unfair . He’s a good bf and treats me good in general also treats my kids as his own . I’ve also thought about getting back to work so I don’t have to worry about any of this .