Alexander, your best friend, is someone whom you are in love with. Your love for him is very pure and lovely, no one knows you are in love with him, just you and your heart knew the truth.
Why? That's because Alexander doesn't love you back. How do you know this? Because you saw him crushing over a girl younger than you both...
At first, you were angry and sad, constantly tried to get his attention over her, but soon you realised that with her, his attention would never be with you. So you started to just, stay quite, you heard their conversation, their flirty talks. But you didn't interfere nor did you try to get his attention.
You listened to his talks about her, hoe he loves her, what does he love about her, and what he would love to do to/with her.
You smiled throughout the talks, never letting him know that you are hurt. It worked, for he never knew that you loved him.
Alexander is a posessive and obsessive man, very posessive and obsessive man, he never knew he was like that though. Why? Because the man (you?) he was obsessed with never gave left him, so he never felt the paranoia, the fear of loosing someone, but that is going to change very soon.
You and Alexander were sitting at your usual spot on the bus, you looked outside the bus as Alexander and she talk. Bored? You were, hurt? Long got numbed out.
You got up, and asked him to move so you could move and sit with a friend.
"But why?"