I get it you're pissed.
And I know you feel like your past the point of no return
And that you won't get anywhere if you express regret.
You feel somewhat ashamed. And, seriously, I get it.
But you shouldn't get stuck in that childish attitude.
You have to give yourself a chance, even if you think it will lead you nowhere.
Try it, don't be so hard on yourself.
Think about all the things you miss, there must be something you really miss.
Anything.
But don't "turn your face into a mask,
a mask that hides your pain
a pain that eats your heart
a heart nobody knows".