FBIL!!!!! VENT!!!!

OMG!!! My FBIL is being such an azz.... Yeah We need this, 3 Weeks before our wedding....
He does like being told who&Who not to bring to the wedding, I told him not to bring his EX girlfriend Because I don't get along with her.. So he said he would bring her (his EX's) sister... Why would he want to bring her to his brother wedding when His EX and her sister don't get along with me... It's all about him So I told him to ask a friend of mine and she doesn't what to go with him SO she going with one of my BM's... And I told him that she going to go with her.. He got mad!!! I didn't tell him why, because I didn't what to hurt his feelings....Bla bla.. I should have!!!! He told my FI, TODAY that he doesn't what to be in the BP now!.. AGAIN IT'S ALL ABOUT HIM!!!!!
I told him fine.. If he doesn't, we're not going to make him... And know my FI is very upset that his brother is being a #%^*(&^$@!#%&
I have no idea what to do.. My in law don't want to get in the middle..

TIA Christine!!

If you didn't want him to bring a guest, why did you invite him with one?

I don't think you have the right to tell him who he can and cannot bring...

JMO