Graphic Designer: Do you charge friends for designs?

I use to design for free for my friends. However I’m thinking about charging them. They are asking for a lot and they think it’s easy. I am tired of spending days/ weeks on designs for nothing. I could of spent that time doing something else. They assume we just snap our fingers and boom! its done. They don’t see the time, energy, creativity, stress, & sleepless nights. If they do want to pay, they offer $20—$30 dollars. I’m really sick and tired of it.