Will she come back for me?

I added a girl on Snapchat and we started talking. I soon wanted to date her. She told me she had recently broken up from a 5-year relationship and needed emotional support. I assured her I was there for her. She shared her experiences with me on the condition that I remain a stranger to avoid judgment. I agreed and hid my feelings for her. She struggled to move on and her ex started contacting her again. I advised her not to give him another chance, but she still had feelings for him. Her brother told their parents, who supported her decisions. She began talking to her ex again to see if he genuinely wanted to continue the relationship. He even approached her brother to discuss their future, including marriage. Something happened between them, and she decided to leave Canada immediately. I tried to convince her to stay but she was stubborn. I drove 565 km to meet her and change her mind, but she told me not to come and wouldn't meet me if I did. When I pretended I was coming, she said she wouldn't talk to me again. I said goodbye to her, and she never contacted me back. After five days without contact, I messaged her, saying I wasn't actually coming that day. She left me on read and hasn't contacted me since. I don't understand why she became so cold-hearted. She's 8 years older than me—will she come back?