How do you break up with someone you are in love with?

How do you break up with someone you are in love with?
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This is my question from last week. It explains why I want to break up.
Is my boyfriend in love with his best friend or am I just feeding into my insecurities? ↗
Basically, I want to break up with him because I think he is in love with his best friend. I don’t know how I am going to break up with him because I really love him.
How do you break up with someone you are in love with?
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