Beauty is in the eye of the beholder. Don’t put yourself down, just amplify your good qualities with glamour magick. Below is a good thread outlining the basic definition.
You can also try an attraction spell vs a love spell so you’re attracting someone who sees inner beauty & personality instead of focusing on looks. I was never one to focus solely on looks. I’m married now, but eons ago when I was dating, if the guy had a nice personality, took care of himself and wasn’t an ass in general, his looks grew on me.