It's not that he CAN'T make her happy, he WON'T make her happy. He just won't pull his family jewels from his mom's and fiancee's purses and act like a man and defend his gf. Apparently his older brother doesn't have that same problem. I wouldn't force her to date the older brother but they can pretend. If she-s supposed to be with the 2nd ML it will work our, if not, at least no one gets hurt because they both agreed to the plan. Don't communicate with or visit the ex bf. Play it cool and walk on by like he doesn't exist. He doesn't care enough to act like a man, well treat him the same. Self respect is not a new concept, own it. I hope that karma hits ex bestie between the eyes and bites her in the a$$. She's miserable but the friends still working there can make it a hostile environment. More than 2 people can play that game. Give her the Arctic stare and shoulder.