What do I do

It’s turns out this guy that I thought likes me turned out he never did. He now has a gf but is still giving me attention to play me and his gf knows about it and finds it funny. They both look at me laughing (she thinks she looks better than me and knows I kinda liked him last year) when we see each other and some of the teachers like both of them. His gf is going off to college soon so they won’t even see each other at school anymore. I also noticed they don’t even talk to each other at school, the boy makes his friends more a priority than her. They also went to prom together. I feel so insulted but also I find them a joke too.