Why?

I have friends who are afraid of being alone, without a guy. They say "I don't need a boyfriend" which is somewhat true, but they still feel the need to have lots of guys to talk to as "potentials".
Even when they do have a boyfriend, they still keep those other guys around "just in case".

The worst is when they keep their exes around. I don't have a problem with being friends with your ex, but it is a problem if you're being friendly just so you can have someone to go back to in case things don't work out between yourself and your new boyfriend.

Brandon says:
a lot of young females can't feel (as) good about themselves without the constant sexual tension and attention they receive

This irritates me so much that I cannot be good friends with girls who do this. Worse still is that I being to doubt myself. If all my friends do this, how come I don't? Is their way the right way?