AITAH for getting jealous of my bf’s (34) female (34) best friend?

This is a community like r/AmITheAsshole, except unlike that subreddit, you can post interpersonal conflicts. Anything that's AITA, including relationships, hypotheticals, and would I be the asshole (wibta) posts are allowed. AI scenarios/posts are not welcome or tolerated. An elaboration on our rules can be found here: https://www.reddit.com/r/AITAH/wiki/index

Is it normal for men to have a 100% platonic relationship with a woman they’ve known for 20+ years?

A space to ask for men's advice.

Are these good signs or am I overthinking and this is just normal?

A space to ask for men's advice.

Is there a chance that he (M29) will change his mind?

A space to ask for men's advice.