I am a school student. Me and my boyfriend are in the same class and we are in 8th. Once I along with my friends were playing truth or dare, and my best friend got a dare to propose my boyfriend. She proposed him and he took it lightly and told that he can't accept her . Then the next day they told me to say him that I am going to break up with him as part of the dare. I went and told him that because my best friend proposed him, I am going to break up with him. He became angry and then he wrote a letter meaning he hates me. Then we never talked each other and when his sister shouted my name he started scowlding her like hell.

This is my flashback.

So what is your question?

I have no idea what my "best friend proposed him" means.

Proposed what?

Did you explain that you weren't serious?
Did you let him know how much you love him and want to be with him when he got angry?
Did you explain it was JUST A DARE?
Because if you didn't do all 3 of these things, I understand why that happened.
He thought you were S E R I O U S