When I was in high school, I was one of those people who always said, "I'm never partying in college." However, once you actually get to college, your opinions of going out can change. When I got to college, I was surrounded by people who were very involved on campus, had a high GPA, and went out, sometimes every night of the weekend. This is when I realized that it is okay to go out and have fun as long as you keep your priorities straight.
Another thing I thought was that when you go out, you have to drink. This is far from the truth. You can go out and have fun without drinking. If you want to drink, do it. If not, don't. (I'm not promoting underage drinking, haha!) It's your life, so you do what makes you happy as long as you can balance the important things with the fun. If you have a big paper due on Monday, maybe you should stay in for the weekend, but if you have finished everything, you have coming up then it's okay to go out and enjoy yourself.
Now, I'm not saying you need to go out to have fun. If you would rather stay in and have movie nights with your friends, then do it. Some weekends, I just feel like having a girls night and we order pizza and binge watch Netflix, you can have fun going out and staying in. Being a person who doesn't go out doesn't make you not fun; Live your life the way you want to.
I just want people to stop judging each other's lifestyles. Going out doesn't make you a bad person and neither does staying in. Chances are, both people are very involved and have good grades. Everyone has the opportunity to live the way they want, so don't worry about what others are doing just live for yourself.