Wanna break up with him? How to do it?

Im a reserved girl... so I fall in love of this guy. I don't feel good. First he was saying me a lot of beautiful things but I avoiding him after Time now Im always saying him I love him but he is cold sometimes and sometimes not.. I don't Like this actually I feel stupid to open AND say my feelings to him. I wanna break up... excuses or a way of how to do it?

Wanna break up with him? How to do it?
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