Why is being friendly with some girls problematic to them?

I just got to know that my friend thinks that two of the girls I know may be avoiding me because of me being friendly.

I don't understand. I have treated them just as normally as any other girl. They do not seem to have any problem with me.

Is being friendly to girls, being actively interactive with girls problematic for some girls?

Why is being friendly with some girls problematic to them?
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