I really regret going to college and it may be the worst mistake of my life.
Why do you think that was your worst mistake?
I guess mistake was the wrong word, but it feels like a huge waste of time.
It's good to go even if you don't feel like you are learning anything, because it helps you to grow as a person. Maybe you should try taking it more seriously so that you feel more like you are getting your moneys worth? That way it won't feel like a mistake.
I guess you're right, but how do I know that the degree is worth it?
You'll know when you start to put it to use. When you can use a degree to show off your accomplishments and get a job you want.