i can't sweat that
That’s not even a problem. That’s not even a thing. You’re making a big deal out of nothing.
He said he'd never eat my food. Now he's eating my food. I can’t sweat that.
She said she'd never cry. Now she's crying in the middle of the park. I can’t sweat that.
You said you'd never leave me. Now you're leaving me. I can’t sweat that.