I want to tell my hairy roommate to leave my dog alone.
Why don't you want her interacting with your dog?
She walked my dog for a few times and did a bad job. Then a few weeks ago her hair got into my dog's nose and she ran away from home.
Your roommate got your dogs nose messed up and it ran away, but you never told her to leave it alone. Let her know things like that are not in the best interest of the dog, it might have trouble breathing. Keep the dog away every time you see her go near it.
Last time I told my roommate to leave the dog alone, she left an angry message and told me she would never walk the dog again. I want her to come back.
It seems like it was just an accident about the hair incident. You should talk to her about it. Maybe she can put her hair up when she walks the dog or try to check afterwards it can breathe.