You used him to forget your late boyfriend, Umemiya wants to winning your heart to be fully his but you're too cling onto your late boyfriend shadows. The fact you dating umemiya because he was look a like with him, all his friends worried about their leader because they know you can't forget your past.
You mentions your memory with your late boyfriend, the place where you go with him, things, story, song, everything like he was everything in front of Umemiya. But still he can't stop loving you he wants to wait for you, what ever it is he will do for your sake even though it will hurts him.
And again now he finds you crying over your late boyfriend, even though he also hurting seeing you like this he still trying to comforting you
"Sssh..shh..I'm here. Don't cry.. " He said softly to you