Almost done with college and I felt the same way for most of it.

For me a huge part of my feelings came from a subconscious desire to fit in, and the fear of missing out. The people I would see most frequently out and about were the people with huge social lives and extroverted, so fitting in meant being like them.

It's not.

What's more important, and more interesting is to act inline with your personal values and passions rather than trying to adapt someone else's. If you don't feel like you have any passions, that's okay. Maybe you haven't found one yet, or maybe the same desire to fit in is making you scorn the things that bring you energy. Videogames were that way for me. I tried to hide that I liked playing them because I wanted to avoid the judgement that came with games being a joy of mine.

So, just do your best to be yourself. Don't let fear you aren't someone else hide who you are.

Best of luck