Ladies, answer this question for me regarding break-ups.

[LostInAnomie]

I've noticed a pattern in my life with all the girls that I have ever had break up with me. In all cases it has preceded by the then-girlfriend finding a new group of female friends, which is then followed by discontent on her part, and finally the break-up.

Why is this? Do the new female friends intentionally start problems? Do they plant seeds of doubt? Or, is a woman finding new friends a sign that the relationship is already is trouble?

I'll be interested in your input.