Give yourself a deadline for moving on, and make it happen.
This means being an adult about your finances and making sure that you have savings to weather whatever downtime you might have between gigs. It means staying in and working on your portfolio at night instead of going out with your coworkers. It means not getting sidetracked by any guilt-based or fear-based reasons you might want to stay just a little bit longer. It means promoting yourself and your creative work and taking your career seriously, not just being a dilettante with a tedious habit you half-ass your way through. Stop making excuses and just do it. Because if your job is unfulfilling, you’re never going to grow to like it. So why don’t you do something you love instead?