I think anyone attending graduate school and doing a professional program is strapped for time. Beyond 40 hrs a week of interning, I have assignments to complete at home, presentations to do, studying, meals to prepare, exercise, psychotherapy, laundry to do, grocery shopping, ironing professional clothes, and me time (which I require, maybe if you don't need "me" time, then). You can do it. I know some people who have had relationships. I know a lot of them just hookup, which there is nothing wrong with as long as you keep yourself safe. I also think most guys in their 20s don't really want anything monogamous yet, so they don't get serious with anyone or shy away if it could get serious before it even starts. I also skip out on friend time because that's too much to organize.