What more can I do?

I have these wonderful friends, Maisy, El and Rube. The thing is that I'm not as close with Rubey as the others are, because they've all been bestfrineds since primary school and I kind of came and joined them at the start of year 8. Rube goes to a different school so that means I dont see as much of her.
The three of them (El, Mai and Rube) always seem to do things on fridays together, I'm ususally invited but I dont always want to go, but then I realise, oh shit! I should have gone because I most defenatly don't have anything better to do. I come home from school and I'm bored. As soon as I walk in through the front door, I walk straight to my bedroom and try not ot come out. You see as bad as this sounds most of the time, I strongly dislike being at home.
When you have a mum like mine, you cant be around her too much or for too long. At times you want to try spend time with her, but it turns in to a fight and it just doesnt happen. Her partner well, lets say this much... He hates me! No joke he even tells me to "fuck off!". My dad has married a chinese woman and has left myself and his two other daughters, his mum (my nana), his brother and sister, and his really good friend (old tom) whos getting older and my dad always takes him out for dinner on a monday or tuesday, well used to atleast. So when im at home I remember all of these things and then what happens? yep thats right, the tears start pouring down my face and they just wont stop!
This happens every night. I cry and I cry. I'm so happy and myself away from home, and I cover it all up! but once I'm home, I don't come out of my cage. I cant help but feel the tears, swell up in side my eyes. I blink. Then BOOM they run, down the cheek to the edge of my chin. one after the other.