I can understand how you feel about waiting for her.... The hardest part is that she said she will come when she wants to.... Maybe you should do others things just as @merit.ahama said while waiting for her, that way, you do not start taking note of the waiting period.

You are lucky she said she will come, someone I know told me, I shouldn't even wait..... Even when I want so much to wait.... I have to do what that person wants as long as it makes him happy