She could have been mine?

Time was of the essence, when I could have made my move. 2 in the morning sitting here looking at facebook. Brianna is in a relationship. One hour ago I was making my plan to talk to her, and become closer. Now, forget it, it's over, done, she's with someone else. Feeling so happy, thinking up a plan for us. Too shy for too long. My paredolia- my personal un-existing uptopia of peace that me and her are together. I want to be alone, wait until this relationship ends? All of this thinking? **** it. I just feel sad.