I had a dream i was kissing my best guy friends neck?

so i had a dream that i was kissing my best friends neck and like snuggling into it and he had one arm around me and it was just the weirdest thing. i have been best friends with him for almost 4 years now and ive always had a crush on him but he just thinks of me as more of a sister but he has had feelings towards me before. also he has a girlfriend now im a little jealous but what could this mean ?