Should I not have told her?

O'ne of my friends saw this girls boyfriend holding hands with two other girls and she told me. I told one of my other friends, and she ends up telling the girl. The girl confronts me and questions me. She then tells me what im saying isn't true and that she's with her boyfriend all the time. The girl has been picking on me, making fun of my looks to everyone and being rude to me all because of what i said.

Should I not have told her?
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