Most of the South Side, now, knows that Mickey and Ian are in a relationship. Only Lip knows how long it's been going on but he doesn't understand, especially not the emotional component that binds these boys so tightly together. Out of everyone Mandy and Svetlana probably know the most about the boys as a unit because Svetlana was present at one of the most traumatic moments of their lives, and Mandy has been active in supporting this relationship since she found out (even if her support sometimes is harsh or counterproductive). Carl and Debbie seem to accept Ian and Mickey's relationship as just a normal romantic relationship, albeit they don't know when it exactly started. Yet even out of all of these characters, not one person actually knows the full history and depth of Mickey and Ian's relationship. Not. One. They do not understand how deeply emotional, how all encompassing, and how freeing that love is.