I'm thinking of going somewhere where there's more people trying to do bigger things. My coworkers' lack of ambition is rubbing off on me.
How does that make you feel about where you're working?
I'm getting tired of this place.
There's nothing wrong with being happy where you're at.  Conversely, there's nothing wrong with wanting something more from your job!  Neither you nor your coworkers are in the wrong here, and I hope all of you find what makes you happy!
Eh, I'm going to quit anyway and find a new job in the next few months.
Well if you find a good job offer elsewhere that could be a great move for you. I hope you find the inspiration you are looking for.