Oh I'm so sorry to hear that. *Hugs* Its a very hard thing to do.
As for the whole bonding issue-It will come with time. But you have to be open to it. The way I look at it is your horse wouldn't want you to quit doing what you love. And also, with this new horse, its not fair to them to not be open and give them all of you, as they will give you all of them. Does that make sense? They will love you, and in its not fair to them to be close minded. I was told the same thing, and I thought it was great advice.
There's no rush for getting another horse, thats for sure. And hopefully your parents will understand. But don't be completely against the idea.
~*~*~*~No hour of life is wasted that is spent in the saddle ~*~*~*~