I can totally relate to how you describe the feelings of restlessness, boredom and resentment of routines. I also think that you might be a little hard on yourself; you're at an age where you're really still learning about what you want and what will make you happy. Its ok to keep your options open.

Do you feel like you're afraid to commit to one thing/job, or that once you do, you will regret it? I think that's where the issue might lie with you. Maybe you're afraid of settling for something that you might resent later? Or perhaps once you've committed to something, you worry about having to maintain what it takes to make it work in the long run and doubt that you can do it?

What is it about routine that you believe sucks so much?