Not only your feet, but your heart and your head must walk away from him and his poisonous love.
Don’t worry about the wall he’s building, blocking you out. He’ll have a tantrum soon enough and knock it down, like a child knocking down a tower of unstable blocks.
Just concentrate on taking another step, and then another.
It’s okay that you still love him. It’s okay to look over your shoulder. It’s okay to strain to hear him, but before you react to whatever you feel, see or hear, take a deep breath.
Take several.
Then take another step.