I find every "entrepreneur" has a tipping point at which point his/her mind and body decide that it's time to take the leap. It's kind of like falling in love - you can't really explain the feeling but it's just there.

Having said that, in my humble opinion, the answer to "how do I break out of the comfortable life?" is: you just do it. Not quite sure how else to say it. If you believe in yourself, and you believe in what you're going to build/start/operate then trust me, your mind and body will scheme up a way to make sure you do it somehow.

Hang in there. If it's meant to be it will. Good luck man.