What "love at first sight" experiences have you had?

In high school, I had a crush on someone. She is in the class next door to me. To tell the truth, I forgot how much I like her. Maybe I just gave her a second look in the crowd! She is the kind of person who studies well. I am naturally a graduate student. My wish every day is to see her several times. As long as I see her, I will be in a good mood all day I'm afraid she will laugh at me if she knows that I like her. What a pity! To tell the truth, I don't want her to know that I have always liked her. I just keep it in my heart. I just wish I could see her a few times a day. This is great happiness. I don't know why, but I heard from my classmates that she knew I liked her. At that time, my heart just exploded. If I took advantage of the loophole, I never expected that she actually liked me, which was unexpected. We didn't have a mobile phone at that time. I just chatted with her every night and felt very happy. I know I don't deserve her, and I'm afraid I'll delay her study. After all, I was a senior in high school. Later, as I graduated from high school, I slowly lost contact with her, but I will remember this beautiful feeling all my life.