Should i make this friend a bridesmaid?

My best friend from college and I used to talk about being bridesmaids in each other’s weddings. Some things have changed since then, but I know she still expects to be a bridesmaid. We have hung out a few times since college, but every time we hang out, she gets sloppy drunk and ends up throwing up in the bathroom. It’s not fun being her babysitter every time we hang out. She didn’t used to get that drunk in college, but ever since we graduated, she does get that drunk at every event or outing we go to together. I don’t drink much and never have, so it makes me really uncomfortable. I can understand why she would expect to be a bridesmaid, but I don’t fully trust her not to get drunk at the wedding (we are having a bar at the wedding). She also doesn’t fit in very well with my other bridesmaids and honestly I think she would be uncomfortable being there. My other bridesmaids are my sister, sister-in-law, future sister-in-law, and another friend, and they are all very light drinkers and are pretty quiet and laid back (more like me).


I feel bad not asking her to be a bridesmaid because I know she expects to be one. My mom, my sister/MOH, and my fiancé all don’t like her very much and advised me not to make her one. I feel so bad because I would honestly expect to be a bridesmaid in her wedding too. But things have changed since college. I feel like I owe her an explanation if I don’t make her a bridesmaid and I don’t know how to tell her if I don’t make her one. I think she will take it really hard because I’m one of the few people who has stuck around with her post-college and she talks a lot about me being one of her only friends. We were literally inseparable in college (it was your classic reserved introvert adopted by the extravagant extrovert friend situation).
Any advice? Am I rude for not having her be a bridesmaid?