I graduated in four years with excellent grades in a difficult major with honors. I also worked 10-15 hours a week my last two years. I also ran one year in an elite grad school program (I red-shirted my first year). I always did well academically, but I was very careful about never taking a particularly difficult load.
I was a mediocre D1 runner, and I do think my running suffered because of how much energy I put into the academics. I tried to keep up something of a social life as well, although life was mostly academics and running. Probably the biggest problem I had was not sleeping enough, which is absolutely essential to running well.
I think the whole combo can be done, but you have to either be naturally really efficient, or you have to focus on being very, very disciplined. My best running seasons were when I got in excellent routines with studies, work, running, and sleep. That's tough to do when you go from high school, where everything is mapped out for you, to college where you have a lot you need to do but very little forced structure. In some ways, the schedule of practice and work helped force me into better discipline.
You really can't do a ton of all 4 of these: social, school, sleep, and sports. But if you nail down sleep, school, and sports first, you can still get your social in the margins.