I can't make a totally-true comment with an outsider's perspective to the scenario, but I'll second what the gent Starvation13 just said.
She sounds to me a nice girl, and though she isn't attracted to you as a partner or isn't interested in a relationship in general at the moment: that doesn't mean she never wants to associate with you again. A rejection isn't the be-all and end-all. I'll presume you were friends before, but whatever the case - a rejection can be awkward to be sure, but do try to remember that the other isn't often like to dislike you or be disgusted at you simply for popping the question.
She's perhaps noticed the fact you've already been trying to keep some distance or 'put aside' her, and is making an effort to mend that without actually having to... you know, literally tell you to stop stressing out about things.
Put aside the idea of a relationship with her, for a long while at least - and I know that can be hard, really difficult - but please try not to take the route of dodging her as a person and friend to boot. That just unduly hurts her and you, and it's not a necessary result of what happened no matter what people might have you believe!
Whatever you decide to do, though, I hope you manage to get yourself into a good frame of mind about this as soon as possible, since beating yourself up on things is always fairly inadvisable.