Point of No Return

What is the "point of no return?"
In a literal definition, it is the point beyond which someone, or some group of people, must continue on their current course of action, either because turning back is physically impossible, or because to do so would be prohibitively expensive or dangerous.
But what does it mean beyond that? The point of no return is not the same for all of us. It's definition varies from person to person.
Is the point of no return, perhaps, when you've gone in so deep that there is no possible way you could go back, not because you don't want to, but because you can't.
Or is the point of no return when you've just begun but don't know how to go back.
Everyone keeps saying to me

Dani, you have to give things a shot because won't really know anything until you've tried it. You won't regret it.

You're right, it is something I want. But should I really believe them? Is it going to be something that I won't regret? And what do I do about that little voice in my head that keeps telling me to go against it?
What if I lose something most dear to me on the way?
How do you know when to listen to your either brain, heart, or gut?
Sigh...maybe the point of no return is when you've got yourself into something and know you have to get out before you get to that point when you can't take anything back, but you ignore yourself and go in anyway. What do you do when every part of your body is telling you to go, but every other part of your body tells you to stop? You don't really know what you've missed until it's lost, huh.

What really is the point of no return? Read more!