Mid forties 'adult' dating a teenager / barely out of their teenage years is a giant green flag if I've ever seen one /s. Your manfriend is a whole person who's older than you, older than you.

My advice is to date people who are much closer to you in life experience and commonalities. Creeps like your manfriend tend to use youngsters whose brains aren't fully developed because they are wearing blinders to the fact that well adjusted mid forties adults don't think underdeveloped kids are prime dating material.