Yes I agree with you indeed, NWgirl2013. Giving space is never a bad idea.

Now a little update:

After I voiced my exasperation and he felt he may lose me, he got in touch and we went on a short trip together. He's entering rehab right after so I guess he wanted this so I would wait for him.
He also said that we would see how it goes, that it would work or brake. I told him that it scared me that he was willing to decide on a relationship based on a week. He then quickly added that "no, of course not, he didn't mean that!"
The trip was great. Of course we had some arguments about his plans, the way he argues (napalm method ), but in my opinion 80% of the time was wonderful.

Now rehab is a reality and he's starting to get distant again.
His silence may be a way for him to protect himself in case I may give up on him I suppose.

Sadly his family hates me (go figure, why) and they won't inform me about his progress. He already confronted his parents to defend me so I know he really cares about me because he needs them and depends on them.

I know I have to keep busy as rehab can last 90 days and not push him for too specific plans after rehab. He has enough to worry about.
But what should I do other than keeping busy? Will he still want this relationship when he gets out? How do you support a recovering addict?
I told him I wanted to be there in real life too not just in the fun moments. All his plans with me are based on vacation plans but life is not a vacation! I get it that it's a nice idea, when reality looks so dark but it's not healthy.

So, I think he's worth the wait and the patience. We are way too similar to give up.