Why is it that guys tend to open up to girls more than to their own gender?

To give it context, I'm not saying it's the same for every male. Just that I have some guy friends and I encourage them to go out and talk to people when they have problems or issues. I don't know if they do but I think one of the first people they decide to call or ask out is me.

Some of them likes me I think. Yet only one got the chance to admit it. Problem is, I want a partner and not someone to fix.