What hobbies do you have.
I’d just try get over him by trying to fall for someone else, get into dating - if this doesn’t work then just try distance yourself from them both.
It’s hard to distance myself from them as my sixth form is about 40 people
i think learn to get over it and forget because in life youll fancy a lot of people but they wont like you back and thats just life. basically just live your own life and do things you like doing and youll forget he exists that quickly x
If hes your friend maybe you should distance yourself from him for a while because if feelings get involved it may ruin your friendship. Also, try to stay out of stating your opinions on his relationship or giving him advice about it, because it'll be bias and he could end up disliking you for it.