Some men use their mothers or kids or job or friends or hobbies to keep distance from women and don’t fully commit.

It’s a very convenient excuse for him: my mommy wants XYZ so I can’t be fully there for you.

He’s unavailable.

If he sets stronger boundaries with mom, then he’ll find something else to keep from full commitment. Just watch. Next time he’ll be too busy with work or needy friend will call too often. It’ll not work in a long run. He might have feelings but he’s not going to ever fully commit