Why does he do that 😑?

He is my colleague. I met him from two years and now it is our 5th semester. First time I was looking at my TA she was cute so I was hearing her with a smile on my face then I caught him Infront of me looking at me and smile with closed, focused eyes. I got shy then I looked away. I forgot him then after something silly happened then I laughed hard so much with my friend silently then while laughing I moved my face then our eyes met. I got shocked that he was very happy really a very broad smile looking at me it was first time for me to get that reaction so I stopped laughing and got shy. After that one time I was crying and my friend was trying to calm me then I noticed someone like looking behind a wall then I noticed he was him looking at me and then speaking to his best friend. A week after, me and my friends was laughing on my shyness cause my face was red then I noticed his bestie was stalking me all that time, he immediately went to tell him what happened. Another time I was buying something from small open shop then I noticed him from far looking at me. I don't care then just seconds he came to the same place? And stand next to me I acted like I don't know you and continued what I do. After we went up to the class he was sitting something near me, my friend was sick so I just checked if she is fine from my place and really was afraid about her then when I ended talking with looking again at my stuffs I noticed he was looking at me that time. Second year, we were having a test in a computer hall so you know every device has its barrier from others. Then suddenly someone jumped on my barrier my heart got in my foot really from my shock it was him and his bestie. I didn't look at them but I was near to cry from my shock really. Second semester I was walking in the corridor with my friend enjoying talking with each other then I noticed him sitting then he smiled. Now in this semester he always looking behind him after lectures and look away if I catch him

Why does he do that 😑?
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