I understand...
Why you have this girl in mind, you can tell me or not, as you want...
But, if you are feeling depressed because of this...
Sadness is normal and natural about this events, but I think it's not good if it leads you to depression.
A personnal story : I was thinking about a girl after a broken shiduch. I was depressed about this girl, and I was crying a lot.
I went to a Rav, and he told to me "I know it's difficult to accept it, but this is Hachem's will. You can't know what will bring you the future, perhaps something far better than you can imagine. All that does Hachem is for good, and so for this Shiduch. Staying depressed will arrange nothing".
I managed to get andto keep the positive, and to stay sober at this time. It wasn't easy, and I continued to think about her, but the depression was essentially gone, and I tried to stay optimistic rather than sad.
This story has a good end : after some unexpected and miraculous events, this girl became my wife...
Hope this helps you.