Why am I feeling like this? He thought to himself while looking at his best friend since childhood, no I can’t fall for her! She is my best friend

he kept saying that in his mind, he knew you had a crush on someone else and you only saw him as a best friend, he was very much aware of that but still his heart was aching everytime you were looking at the other guy and not him, he felt so jealous he was going insane…