I need to rant

Okay so I don't really have anyone to talk to and I don't know what to do but pretty much here is the story. I'm 19 and I'm living with my cousin. I moved out when I was 16 because of family problems and last night me and my cousin got into a argument because she made a rude comment towards this guy that I like and I Calle her out on it saying that wasn't very nice and I didn't not appreciate that. Well she came into my room yelling at me telling me I over react and over think to much and I wasn't trying to cause an argument. I was just telling her how I feel and what makes me mad the most is that her boyfriend is a heroin addict and I'm always there for her when something goes wrong and I comfort her wen she's crying and he's still living with us but we got In one little arguement and I said "look ill do you a favor and move out when I have enough money" so I'm going to look for a second job but I don't get why he has fucked her over so many times and we get into one fight and she tells me "well this place can work with your rent" but I'm not living in the ghetto. I refuse. It just makes me mad and I'm hurt like can I not express my feelings? Was that wrong of me? I'm not asking for sympathy or anything I just need to vent. I'm at a loss of what to do right now because I don't want to be somewhere I'm not wanted and I don't talk to my father and I can't live with my mom and my grandma doesn't even live in the same state. I've been working my ass off and I just keep getting problem after problem and I cant have one stress free day. I hate this and I hate living here but it's my only option right now. I don't know why this is happening to me.