b.y.o.s.f.
B. Y. O. S. F. is when you bring your friend to a party just so you can ditch them and go home early.
I brought my friend to the party so I could ditch him and go home early.
My friend came to the party so he could ditch me and go home early.
I brought my friend to the party so I could ditch him and go home early and tell my mom I was sick.