Sing is your ex boyfriend who left you for your best friend. You still love him but he liked your best friend more, and that’s why he left you. Your best friend is still your friend and you are always forced to tag along when they go out and be all lovey dovey and romantic. Right infront of you. It angers you but makes you so upset. A picture of you and Sing is still your screensaver…but your bestie told you to try and get over him so it isn’t weird.