I'm 'conventionally' fairly good-looking, but I'm not a model - 5'8", 12-14, face with features in roughly the right places etc.
I'm also 43 and while I'm still fairly fit and toned, I'm not wearing crop tops to the gym. I'm going grey, which I don't attempt to cover, and I have full 3C-type Curly Girl, which is pretty wild.
I've been with my conventionally VERY good-looking other half for almost 20 years (he actually was a model when he was younger!), but I refuse to believe in all this 'punching above your weight' shit.
Here's my secret: I genuinely believe I'm the most attractive, interesting person in the room, even when, statistically, that is highly unlikely. 😁
I like people, I'm interested in them, I smile and listen and ask questions designed to keep a conversation going. People feel comfortable in my company and (for the most part) enjoy spending time with me.
When we go home, my OH is my best friend - yes, we find each other attractive, but more than that, we make each other laugh (A LOT), he's kind, we have mutual interests etc.
My mother always told me when I was growing up 'Marry a man who makes you laugh every day', and she was right.
Confidence and self-belief is the key.