[Daring Scylla]

I agree with Yokuutsu. Let them alone for a while, see if they get over it. You tried your best to explain your feelings of the situation.
If after a while they still don't want to play ball, then forfeit the game. After all, there are other persons who care about you, and if this person can't be bothered, why should you as well.
It'll come to a point where you need to decide whether the irritation and hurt is going to be more or less if you pursue this relationship. And then you have to decide if you want to take the route that causes more pain and if you feel that such a gamble is likely to be rewarding in the end.
I wish I could actually help D: That's my best advice.