She started to write.

I don't know exactly what to think of what you said. You once gave me the promise that you would never leave me alone. But now I have to find out that you cannot keep this. It hurts to think of you, it hurts when I look at your profile. But most of all it hurts that you leave me thinking back that you will never hear, see or read again. I don't know how to endure this without you, you are so indescribably important to me! When I read what was in your profile I was very hurt and I am now too but ... I have to thank you. You showed me so much, made me laugh ... you made me a better person. I am grateful to you for so much that I cannot write it all down. I will probably never be able to forget you and thus there will always be a great empty gap in my heart with great probability. You have become such a big part of my life that I notice every day that something is missing, and that which is missing is you. I have to admit I cry myself to sleep every night and every time I come to our ancestral site I hope still secretly that you are there. But you are not there. But i will never forget you! you are everything to me I love you....

When she was done, she saved it in her profile with the heading Thank you letter to you! and logged out again.
She didn't know if he would come back online someday and read what she had written. But she hoped she went online every day after doing her homework with the hope of seeing him again. But it was always in vain. And so she never saw him again and she hadn't opened her heart to any other boy either because she had always loved him.