Her fear of commitment is exactly why she has gone back to her former boyfriend; there will never be any expectation from him to commit. He’s ‘safe’ when it comes to her fears.

It’s best to end things now rather than years down the road when you are fully committed in the relationship. Go and don’t look back.

Where did you find this lovely human? You don't want to get stuck with trash like that. Just "hit it and quit it" and move on.

Let her go.

Life's too short. Don't get back with her and spend years figuring out you're with her by default. Don't ask how I know.