What is this situation I am in?

My girlfriend always sides with her 5 female platonic friends against me. She doesn't care if one of her 5 platonic friends are the one who is wrong because she will always side with them against me.

The 6 of them gang up on me whenever I have a conflict with any one of them.

The 6 of them make fun of me in front of many people.

They yell, insult, overly control, and sometimes physically hurt me.

My girlfriend doesn't even sleep beside me anymore. One night when her 5 platonic friends came over to my house, my girlfriend angrily and ferociously yelled at me to not sleep beside her because she wants her and all of her 5 platonic friends to sleep side by side together. Then the 6 of them angrily and ferociously yelled at me to never enter the room they are sleeping in. Then they made a very insulting joke about me which made them laugh very hard.

They also boss me around in my house such as them forcing me to cook food for the 7 of us while none of them helps me.

What is happening?
What is this situation I am in?
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