I’ve been so emotional lately

I can’t talk to anyone about this because they just don’t seem to understand. I try to talk to my mom but I start crying and then she just walks away. Like today my sister was screaming at me usually I’ll just scream back but I tried to take a different approach thinking that would just stop all the fighting I just asked her to stop talking to me but she kept screaming at me so I kept repeating myself please stop talking to me then my dad yells at both of us to stop. I’m so confused at what I’m supposed to do it’s like I argue back and where both at fault then I try to take this approach and where still both at fault. I don’t know what to do anymore it’s like people expect me to be happy all the time and I can’t be. Nobody wants to just let me sit here and talk and every time I try to vent to my mom about my sister or anything she judges me or just walks away. I just really need some help and to vent