I can't fucking do this anymore

My entire life has always sucked.  If it wsn't one thing going wrong it was another.  Now, after I had to lose the most important man in my life, my dad, things started to look up.  My brother finally found someone that made him happy, and I got married.  Well marriage is great, mostly.  I get annoyed with having to do all of the cleaning, but hey whatever I am home longer than he is each day.

But then suddenly, my brothers girlfriend decides to be a whore.  Saying God told her that this guy (One that she literally just me) is the one for her.  This is like the 4th time God has said that, so yeah, she is using religion as crutch, and it pisses me off.  So my brother starts moping, contemplating suicide, and kept coming to me for answers, like how the fuck am i supposed to answer.  And then a girl that he dated before, and he realized that he really did love came back into his life, which is my fault, though how was i supposed to know that she was crushing on a player who has told her that he isn't interested in a relationship.  She says she isn't interested in my brother and yet is all over him.  Comes to visit, ends up staying the night with him, and won't leave even when she says she should, just keepts holding on to him, but she says she doesn't have feelings for him?  Like what the fuck?  And now she isn't answering him, though she is at the beach with her family, he asks me to message her, so i do because i had something to tell her anyways, and then he gets pissy because she answers me, even though it was a short reply.  I am sick of being the middle man for this shit.  I have my own stuff to worry about and my own fucking depression to deal with which is steadily getting worse, but i am supposed to have the answer to every fucking thing.  I wish they would all just leave me the fuck alone.  I am sick of being afraid to do anything with my husband like take trips because suddenly someone will need me.  I NEED A FUCKING BREAK BEFORE I HAVE A BREAKDOWN!!