mirror mirror on the wall (what do you desire most of all)

tumblr prompt "They go to the Mirror of Erised once a year. This goes till sixth year, where Person A sees Person B kissing them. They find themselves fine with this but don't say. Next year the two drift apart due to stress. Later, A visits the Mirror and still sees themselves kissing B. They then notice B crying in front of the Mirror. B reveals they've seen A since Second Year."