Hi kray bray may, well I'd say that it's good you managed to learn from your first relationship and you've shown a lot of insight in identifying (and by the sounds of it wanting to change??) that trait in yourself.
Now if you're initially attracted to certain looks then that's fine, but you're right there are (so many!!) more important things about a person.
So do you think that you could have a think about/list the other things such as personality types, humanity.........which you can acknowledge as good traits??
I'm thinking if you could start really seeing how important, valuable, even attractive (!!) those traits are in someone the more you might be able to see them in other people regardless of looks/appearance........the more you might be able to really appreciate those traits, those people.
And maybe in time that might lead you to seeing that it's those traits, who someone is, that makes them attractive and makes them look attractive.
Of course some people are going to have preferences e.g. long hair, short hair........but that doesn't need to make someone who doesn't meet those preference less attractive while they have some of those traits. Everyone can be beautiful!!
Alison