Hi guys I really need your help . Please give me a piece of a | HeartCouncil

Hi guys

I really need your help . Please give me a piece of advice. I liked a girl, and tried to say that I love you. At first, I felt nervous because I am a bit introverted and shy. But then I found a strength to say it. Sadly, the answer was not as I expected, I was rejected.
However I had belief that she was also in love with me. When I said that I love you, she replied me like this " honestly, I am so sorry don't be upset. But I can't love you, I love someone, even if he left me all alone. I can never forget him. Let's be friends" . Then she left and hasn't talked to me for 5 days. ( I forget. We are actually coursemates with her. We study the same course).
But a few days ago she came and asked me help. She was like different girl. She talked to me like nothing happened but so sweetly.
And I don't know what's happening now.
So please give me advice. What should I do? Should I ask her to date with me again or should I just wait like what will happen in the future?

@HeartCouncil