Flatbush, I was reading what you said carefully , and there is almost a reccuring theme ” you need to look out for yourself, it was her fault, she ruined the engagement” It sounds like she called it off, and thats extremely upsetting. Having been in the same situation years ago,There are a few points I need to make. You were supposed to meet her, but HKBH did not want you to marry her. Think of the good things that came out of the relationship and be happy that it happened.Even if it was her fault, Forgive her. If you really want to go out with her friend for the right reasons then you will. Do not do anything out of spite, becuase then you are still hurting yourself. Be happy you met her, forgive her, and move on, and you will meet your bashert very soon.