[Gmac]

We call it "ghosting" here. This is something all women (and plenty of men) do. It's a fact of life that you just need to learn to accept.

Women ghost
Women flake
Women creep
Women lie

The sooner you accept that basically women do these things the sooner you'll be able to filter through all that bullshit and get what you want out of women and in life. Expect it and you'll be better prepared for when it happens. And in the future it won't affect you so much if at all.

Ok, so after re-reading my response that's a very vague answer. For your situation, I'd say she's either busy or is losing interest. Pique that interest somehow (i.e. send her a message or an interesting picture of something you're doing) or set up that next date immediately. If she's still radio silent, next her.