SoH - my best guess is that something in you won't let go of it. You still describe yourself as conventional in contrast to her colourfulness. Mentally and emotionally, I would guess that you see her as the ticket to a more colourful life. But this is an illusion. You like the rest of us need to dig deep in ourselves to get what we lack. Become your own ticket. Let her go and post about / examine your life here instead of the minutae of the LOs doings.
Here's my last chance to convince you: if you've already disclosed, the second time you do it it gets really worrisome / annoying / burdensome for the LO. It's almost never well-received. I've been on the other end of it and it doesn't feel fun — I sort of want to run away from the friend doing this. I don't thikn we should ultimately care what "our" LOs think of us, but I think you don't want this possible regret. I would choose the path of honouring what was genuine in your friendship and at all costs, don't allow the possibility of a negative experience be her last memory of you.
If anything I'd send her a postcard a couple of months from now that reframes your relationship as friendship, even if it's not totally true. I'd write something along the lines of "Sorry for not seeing you off. I appreciated the time you were here so much, you were a good and special friend who showed me a lot. Thanks for all the great conversations and laughs. I will never forget you and will miss you greatly, friend. Take care of yourself and may the wind be at your back, ____!" Or something like that.
Yeah, so I'd say don't risk the possibility you might 'act out' in their height of limerence! You've got an ego to protect too. (BTW: I've done this before with a different person. I thought I was going to be so cool and then bllAAAARRRRGHHH! Out came this incoherent confession as soon as I had 5 minutes alone with the person, so strong it felt involuntary. It felt like emotionally barfing on someone. Not cool!)