What would you do if your partner's ex is way sexier than you?

I am entering a relationship and I saw his ex. My heart sank a little and I am sort of tempted to dump him because, damn... I cannot compete with that?
Yes, I have insecurity issues and I am trying to get past that.

What would you do if your partners ex is way hotter than you?
What would you do if your partner's ex is way sexier than you?
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