I've lost passion for everything. Nothing has been fun or cool for a while. How do you rekindle your passion for anything?

Life has been pretty bland for a while now. I remember as a kid I used to be so interested in everything. Now it seems I just go to college, hang out with the usual few friends, and do basically nothing. I just get ok grades, and don't really care about anything. I got a speeding ticket last week (first time being pulled over), and it didn't even phase me. There's been a few stress inducing things in my life recently, but I've just become a really lame person. What's your advice, reddit?