Love Needs No Explanation

She had always regarded him as a friend. She might forget him when she was happy, but when she was frustrated or sad, she would lend him his shoulder to lean on. She didn't know why, but every time she leaned on his shoulder, she felt inexplicably at ease. Until later, when she discovered that the person she had always loved was him, there was already a girl beside him... I don't know since when, he has been loving her silently, not even wanting to cause a burden to her. He has not shown his love, watching her fall in love with others again and again, but loving silently like this really makes him feel a little tired and makes him want to give up, but she can't control his heart and still loves her. When will his heart be discovered by her...