Can you manage work with Social life?

I find it hard a lot of times to maintain a social life between both work and going to classes. I try to get out on the weekends and spend time with my friends but I'm usually too tired to be out as long as I would want to be. Other than that I keep in contact anyway by just calling and having a talk when I'm too tired to do anything. Its hard to maintain all of it but I do manage.