I had a nightmare about a teacher...?

um hi my nightmare was at a friends house. i fell asleep and i had a dream about a teacher that nobody at my school really likes except her homeroom kids. i'm a 15 year old girl and i had a dream that my teacher said "nobody likes me!" so then she said, "so i'll meet you at the cliff nina" so then i was at a cliff and she jumped off and i woke up and i screamed and my friend said my eyes were open so she woke me up. it was so freaking scary! can anybody tell me what it means?