How to spot a womanizer?

So i have been dating this guy , he is super friendly nice and charming with everyone. and of course got female friendships also. so my question is how can someone spot the difference between a guy who is a flirt ir a womanizer in general, or is being just nice and friendly without any I'll intentions involved? because some men can be diplomatic right.. also what should be the deal breaker if he does any of that which is not normal with female friendships?

How to spot a womanizer?
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