The idea that you have to go, go, go to the detriment of your social life is just silly. It's part of the myth of the startup, not the reality. Founders love to talk about how hard they work, but in my experience the good ones find real balance between work and life.
I work a 50'ish hour week. I don't kill myself. I take the weekends off. I spend time with my wife and friends on a regular basis. We get things done, we ship early, and we have really made huge headway on all facets of company building... and have done it while maintaining our friendships and marriages as well.
Working a ton of hours isn't going to make you successful. Hell, the most likely outcome is that the stress and demands of that pace will do nothing but limit your ability to make good decisions.
Just a bit of friendly advice.