Apologize sincerely about what it is you can find to be sincere about. If you don’t regret what you did, but can feel (empathize) that it hurt someone and you can be sad/remorseful/concerned that it affected them negatively, then apologize for the pain/discomfort it caused. Be Sincere. Don’t be a jerk and apologize and then take it back. Apologize and shut your mouth if you are going to retract it. An apology demands that you adult.