承认你的感情。 对自己说实话。 意识到这不值得。 不要曲解事情。 回顾你的记忆。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
You already know that you have feelings for this person. If you have not fully admitted to yourself just how strong those feelings are, though, you will need to do that before you can start getting over them. Ignoring the strength of the enemy—in this case, your own feelings of affection will only make it more difficult to triumph in the end.  Even though you never actually dated, you invested a lot of time, energy, and emotion into this person. The depth of your feelings probably reflect this.