As the title says I'm struggling with the concept of an abundance mentality.

For context I'm an athletic but slightly below average looking 5'5" short guy with no relationship experience at all, barely any self esteem, and severe anxiety (all of which I'm actively working on improving).

I'm well aware that most girls see me as undesireable which is why I've never had abundance in my life.

Like the title says, how do I make myself believe that there is an abundance of girls interested in me when in reality there are very very few?