<human>: This might get a bit long, so I apologize ahead of time.

My ex, or rather ex best friend (we were never "official"), of a decade met someone nearly a year ago online. Completely enthralled by him, and after a year of some difficulty between the two of us, cut all contact with me and moved in with the man she'd known for a month or so. That's where the story starts - we were inseparable until she found someone online and within a month decided he was worth cutting all ties with me (blocked on all of our mutual websites, AIM, phone, etc).

Six months later, she shows up at a bar I go to, and wants to make amends, sort of. She wants a peace between us. I agree - simply because I had truly loved her before she did this.

Silence for three months. And now the situation - she wants me to meet her fiance (yes, already engaged; only been eight months but they're engaged. She lives with him.) because she has been missing me a lot, missing the old times of bumming around.

I have moved on, though. I've spent a lot of time the last few months getting over her. I've managed to make myself realize that we were never going to be together, we were done. And then she does that.

What do I do? In my heart, I love the person she was - but realize she is not that person anymore. Do I forgive and go to meet with her fiance, or do I say "thanks but no thanks" and leave her to the pain she claims to be in over the past? If I go, there's a good chance I can recover my friendship - not my relationship - with her, but seeing her with her fiance might just send me into a misery spiral.

I don't know what to do - does anyone have any suggestions? I hope this was clear enough.

Summarize the given text in a few sentences.
<bot>: Best friend/partner cut all ties with me after meeting guy online; 8 months of virtually no contact later, she and guy are engaged but wants me to meet him. Not sure what to do.