I’ve always thought as myself as ugly what can I do to help me change my mentality?

I used to get picked on by girls in school a lot and guys would make fun of me as well. That definitely messed up my self confidence. Also, I’m really introverted so I don’t like to interact with strangers. Any advice on how to change my mentality would help. I know it’s wrong to think less of myself, but years of negative experiences really traumatized me.
I’ve always thought as myself as ugly what can I do to help me change my mentality?
I’ve always thought as myself as ugly what can I do to help me change my mentality?
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