Is he really sweet or an idiot?

I've been with a guy for a while now but there's still this girl who won't stop "trying to steal" MY man!!!

She always post up sexy pics and tag him and stuff and my boyfriend is so sweet, sweet to the point of being scared to hurt her feelings... omg!

So basically he's saying he tried to talk to her but she won't listen.

I don't understand guy logic cause if I was him I would have stop talking to her a long time ago but somehow he can't.

I know he doesn't have feelings for her I'm positive but I don't understand why guys do this?
Is he really sweet or an idiot?
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