What to do if I have no interest in anything

Im currently in college and I realized that it is probably a good idea to get to know people for general reasons but also because my desired career involves a lot of social interaction. Im also interested in having a girlfriend.

As far as I can remember I've never had any hobbies or "micro" interests. Every time I would try something new its always boring or sometimes expensive. I don't enjoy travelling, MOST music and shows, trying new food, etc. The only things I enjoy/feel are worthwhile are studying, working, and going to the gym. I play a lot of video games but I don't even enjoy it, a lot of the times its just a distraction from a problem I'm facing.

Realistically what is someone like me supposed to do about this? Should I just fake enjoying popular things to seem more relatable? Any ways to "force" enjoyment?