I asked a good girl to travel alone, and she agreed. Can we be lovers?

With a girl's intuition, you will become a couple.

If you want to analyze rationally, you can also:

First: the girl you like is a little extroverted, or rather, both inside and outside. Although she rejected you in high school, she has been paying attention to you, even joking about your moon, but she is paying attention to you.

Second: She asked you out on her own initiative.

Third: it is a common trick for girls to use friends as a shield and finally not go.

Fourth: I changed the travel time several times, and finally it was just the two of you, or during her birthday, indicating that she wanted to spend an unusual day with you.

Cherish and confess again, on her birthday!

Finally, I wish all lovers well.

It's just a personal opinion, for reference only.