Feelings

I like this (the) feeling, which (that) comes after a despair. I call it "freedom". When you(present tense) reconciled (present tense again) with the things you couldn't (can not), or (could not HAVE changed) change, when you finally got it.

When you finally realized that there was nothing to worry about, because it's not under your control anymore.

-either:

When you finally REALIZE there WAS nothing to worry about, becuase it WASN'T under your control.

-or-

When you finally REALIZE there IS nothing to worry about, because it IS NOT under your control.

When you let yourself keep walking your way. (Did you mean...When you allow yourself to walk away)?

And After loosing despair and the paind (pain) it caused you feel empty a little bit, but it's (that is) exactly a freedom.

Or...(but that is exactly what freedom is).

Feelings

I like this feeling, which comes after a despair, I call it "freedom". When you have reconciled with the things you couldn't change, when you finally got it. When you finally realised that there was nothing to worry about, because it's not under your control anymore. When you let yourself keep walking your way. And After loosing despair and the paind it caused, you feel empty a little bit empty, but it's exactly a freedom.

Perhaps: ".. because it was never under your control."