Could it be that you don't want M to date/end up with your friends because you don't like the way he's treating you? (Or dislike certain things that he does to you... case in point the OP.)
If so, why is it OK for you to accept this when you probably know you find his behavior unacceptable (for someone you care about)?
Bisexual woman in my 20s
Single and dating
Bear my on again bf of 3 years (6 year relationship)
SM his wife
I'm also dating Billy and have a play partner Prettyboy