I think right now your best bet is to go dark and take care of yourself. Stay in touch with both parents. This relationship of hers may burn out 6m-2yrs, most relationships do NOT end up in marriage. Keep up with your changes, and at some point, she will get curious when she hears how well you are doing.
You might have other opportunities to just bump into her. You really do have to avoid anything that looks to her like pursuit.
