I kept waiting for the part where she would start asking for money in some form or another, I'm actually really surprised that never happened, because a lot of he behavior, how quickly the relationship got off and your comments about your perceived self worth really made it seem like you were a classic victim for a romantic scam.

But if there truly has not been any attempt at it for so long then I'd hazard to guess she's has some mental issues, possibly serious ones if she sent you a message hinting at possible suicide, and she connected with you for whichever reason but she's nowhere near stable to have anything even resembling a healthy relationship or perhaps even friendship.

Honestly, if I was in your shoes, I'd treat her existence as a sort of. how could I call it?, a box of surprises perhaps? she's not someone you should continue to make a cornerstone of your life and you would do well to assume that every time you have contact with her it may well be the last. But as long as you can keep such boundaries, just try to enjoy whenever she's around, if she's the only person you hit it off to any serious degree right now then just enjoy her when she's around but try to keep enough emotional distance because she's clearly unstable somehow.

A tough balance to try and maintain for sure but I think it's the best you could do.