Awww...HR~

I'm so sorry this is so difficult for you. I know how it feels to have to go through that uncertainty.

"Have no expectations, but rather, abundant expectancy".
In other words, "expect the worst" (prepare yourself for what the worst can offer), and "hope for the best" (remain hopeful that this will work out). I believe this is what he meant when he told you that. Although, this applies to you, as well. It is to your benefit to prepare yourself for that worst, that way you will not be devistated IF he chooses not to continue.

I am still inclined to think that he is in some serious need of his own space for now, which I also think is no reflection on what he feels for you.
Because of the fact that he really has had no time to himself before you, or at all, really, he has reached a point of needing just that for himself, which is perfectly normal and rational. Again, I do not believe it is a reflection on YOU.

Allow him the time he requests with minimal contacting (I know how difficult that must be for you). It seems though, that if you go against his requests by repeatedly contacting him, then it's quite possible that you just may add to the issue he is presently experiencing, (which at this time is not because of you)..Don't make it that way for him. Don't provide him a reason to want to stay away from YOU, as that is not the case at present.
He is honorable enough to be upfront and honest with you regarding what is going on with him. And I'm certain that you appreciate that. Acknowledge that by respecting his requests.

From all that you have provided, it sounds as though he simply needs to have some space to think things through for himself. And I really dont think that this is a reflection on you, or his relationship with you, as from what you've provided, your relationship seems quite sound.

Allow time to be your ali. Do your best to wait for August 1st with as little interruptions as you possibly can. This will prove beneficial.

Keep in touch. Let us know how it's going.
My thoughts are with you.

Shangrala