Wedding Party

Originally, we were just going to have my sister be my MOH and my FH's brother be the best man...but the friend he grew up with is overly sensitive and he said that he NEEDS to be in the wedding party or his friend will be "so hurt." I can't choose between my 3 girlfriends so now our wedding party of 2 is now becoming a wedding party of 8 plus us. We are almost 40 and I'm very non-traditional and don't want to have to deal with the stress of having people in our wedding. I suggested his friend be an usher but he said absolutely not. How can I convince him to just have it be my sister and his brother standing up? I also said that it can be the 2 guys and my sister but he said that he can't make his friend walk down the aisle by himself (eyeroll) haha. HELP ME CONVINCE HIM! lol