Split bills with SO or one of you pay all bills?

I just wanted to ask you guys , does your significant other or you pay for all bills or do you split? My bf and I live in his family house because his mom and grandma needed help around the house. My bf has been paying rent which is $300. He’s been volunteering for hs football as a coach and I just recently got a part time job. He was complaining about how he has to pay rent all the time and what do I do in the house? I clean, I cook sometimes and I provide food in the house. It makes me irritated because that’s all he has to do. He doesn’t cook unless it’s breakfast, he doesn’t clean and he doesn’t appreciate what I do. Neither has he helped fix our car that’s about to fall to pieces. He has put in gas and that’s it. I’ve been saving money for our car so we can fix what we need to fix, and he complains how I only give his mom a little money. I barely can give my own mom money because I don’t get paid enough nor can I work extra hours. I feel that I need to provide for my own parents before I provide for someone else’s . I’m looking to get a second job so i can make more money and help out but he’s not even looking for a job because his excuse is that “he coaches football and it’s a lot of work.” I get it’s hot and you’re outside for long hours and I even told him I could go half on rent but he said “ no it’s okay I got it.”