What would you do if your sister interferes in your dating and love life?

My sister is a feminist, I hate her. She told my girlfriend that my brother is a loser don't date him.
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I want to date, marry, have kids and start a family. Girls keep rejecting me and my sister interferes in my dating life. Why are women so bad these days? Sometimes I feel very low, frustrated and depressed. It is taking too long for me to settle down.
What would you do if your sister interferes in your dating and love life?
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