Sadly, your friend might have been using you. When she needed your help she contacted you. When she didn’t she ignored you. You were her friend of convenience.
As a general rule, treat people the way they treat you. No better and no worse. Based upon your description of events, you had more invested in this relationship than she did. There was a clear imbalance.
We cannot control other people. You can offer your advice but understand that the recipient may or may not take it. That is their prerogative. You can only control your behavior and your reactions in any situation.
It can be difficult to watch people we care about make mistakes. For deeply personal reasons, she chose to live her life the way she did. She made mistakes for which she will have to pay the consequences.
You can’t change history but you can change your future interactions with her and others. In the future, don’t put more effort into a relationship than the other party does. Having this type of boundary will protect you from future disappointments. Please take care.
Dr. Kristina Randle