Hi jammit,
Good for you feeling strong enough to go in person and wanting to keep things to a simple hello. This could be a good opportunity to check in with how far along you are in your detachment.
That said, you say that you're currently "fuming" about being blocked on all forms of communication. Do you feel that you'll be able to keep your emotions in check if you meet her in person? If you do go to meet her, I recommend that you think of any message you want to send as one that you're sending for your own sake, not because you hope for any reaction from her or hope that she "gets the message". If you're worried about how she's interpreting your actions or how she's feeling about them, you continue to place a lot of power in her hands. And usually that's something that others can sense, to some extent or another. If she senses that you're trying to send her a message, that will give her validation that you're still focused on her thoughts and feelings and what she thinks of you.
So celebrate that feeling of strength and defiance, it's a healthy response to being hurt and treated unfairly. Just be careful about focusing on whether or not she sees it and gets the message. Celebrate your strength for your own sake, not to get back at her
