To change, you have to want it.
Change means leaving your comfort zone, which means facing pain.
But the reason you created a comfort zone is to avoid pain.
So now you have two opposite wants.
One towards change and growth.
And one against it.
In the larger scheme of things, pain is irrelevant.
Go through the pain towards your personal win.
And win.
You're in the middle of your actual pain, but what gets you stuck is the pain you imagine.
There's none.
When you look back, your past comfort zone will be, in contrast, pain itself, a personal hell you would never return to.
Get going.