I Liebe Du

In my chemistry class, I'm sitting Weiter to a guy that I liked before, in the back of the classroom.
As we are in the back, and the teachers do not attend, we can laugh whenever we want.
One Tag he told a joke, and I started to laugh, he simply smiled and started laughing too.
The boy that (I think) I like now, was looking at me at the time, so did he did a bored face and sagte loud:'' Look at the lovebirds laughing!''
Then he looked at me as if thinking,''What, Du like him now?'', And when the class was over he ran after me and sagte ''you two deserve to be together, go, be happy with him, bitch''...