You could just try and maybe move on, there's always someone else waiting for you, or you can try and maybe understand why your beiing friendzoned and move from there. There's no need to be depressed, I'm sure I've been friendzoned sometimes and I though it was better to just accept it and move on. But of course this is your life so the choice is yours to make.
block their socials, delete pictures of them, and throw away the things that really remind you of them. besides, you are great and they dont realize that. also, try distracting yourself with new hobbies or regular hobbies (examples: netflix, art, planting, video games, or anything you like)