Saw my girlfriend slagging me off over text too her friend what do I do?

my girlfriend was in the shower and i couldn’t find my phone so i asked her if i could call it using hers. she said yes, i opened the phone on a text chat between her and her best friend (both 23F) and too cut a long story short saw a lot of messages from her telling her best mate i have a tiny dick or when we have sex she doesn’t feel anything and stuff and they were both laughing about it.

should i bring it up or should i just dump her out right?

need men and women’s advice please

Saw my girlfriend slagging me off over text too her friend what do I do?
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