Uhm, you're already appearing as a stalker. Let her go. Do not contact her, do not try to convince her. Speaking as someone who has issues with feeling safe, LET IT GO. If you steal her feeling of safety in this world, that's one of the cruelest things you can do to someone. (Feeling safe in life is a NEED, right above food/shelter/water on the pyramid of needs. Don't mess with that.) She has already told you "no" so take that and walk away.