start by getting a friendly yard game together, and inviting her to play. if she is cofortable playing on a team of freinds she might be more inclined to go back to playing on a more regimented team.

I hated playing football at first cause the coach was harsh on me, BUT it was to get me motivated. it didn't work, cause i only played like 4 months of ball. I'm kind of a easygoing guy, so running and hurting others was not my style.