Don't worry about these, it's useless. First of all, it is most important that you get her. It is impossible to ask the other person directly, such as leaving a message, without knowing whether she heard it or not. I think:

First of all, you should try to find her through your high school classmates. You can find your other classmates and get her through alumni records or other means.

Then, even if you leave a message, stick to it, but write with your heart. You can say hello every morning, remember her birthday and remember some festivals such as Valentine's Day!

Then, don't be trapped by love, do nothing, it won't work, as long as you care about her in your heart, and external repression won't do, so this year will pass!

One more thing, I think you are a little like before my husband and I met. At that time, my husband would not live for a few years, but I really didn't know, because my classmates didn't tell me, I didn't know!

Perhaps, the girlfriend you are chasing now, although just writing, never sees what others give her back. Generally speaking, it depends on whether there is much news from others, if she is busy with her studies.

So, come on, don't be discouraged! Support you!