how to not feel angry at people who are never there when you need help

I had a pick up know how many people I helped move. If I'm spending my Saturday helping someone move all I wanted was beer. The best to help have a case at least in a cooler full of ice. The worse has a six pack in the fridge no boxes pack and when you ask for a beer they are like see man you gonna start this early. That's when I say just a minute I do need cigs and I go up and buy a12 pack and come back this guy was a bar fly and had the nerve to only have six beers that weren't his it out brand some cheap shit. I say and talked while they packed. If there that box right on down to my truck grab another bud and pound stairs going back. He said the were already

Yes, seen that movie to many times. I learned to cut those people out of my life a long time ago, and learned not to be so generous with my time and skills.
I have a much smaller circle of friends now but know I can't count on the ones I have left if I need them.