One, could you please spell check as your answers can be very hard to read. Two, no matter how you try to frame it, the fact is that in the warnings he uses the word "you," not "us." It's clear that the warning of falling away was for "them" while the promise of being confirmed in Christ was for him and them. It's what the verses plainly say.
But you have demonstrated that you only like context as far as it agrees with you, because if you expand the context out to include the whole chapter, even, then the meaning becomes clear.
This chapter is talking about the people of Israel, who were promised the "land flowing with milk and honey." Yet the generation that saw the deliverance from Egypt was never able to enter that land. Even though they saw God, through great wonders, work his deliverance from Egypt, they hardened their hearts every time there was trouble, because of their unbelieving hearts. That is why that warning is there. The author of Hebrews is saying to take heed - that is, to take a warning from the people of that time - and not persist in unbelief despite seeing God's wondrous deeds. That is why he talks about their heart of unbelief, and adds at the end that the reason they could not enter His rest was because of their unbelief. He wants to stress that unbelief will result in death.
The next chapter then makes it clear. He says in Hebrews 4 (beginning in verse 1):
Let us therefore fear, lest, a promise being left us of entering into his rest, any of you should seem to come short of it.
2 For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard it.
3 For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.
Again, here the author includes himself ("We which have believed do enter into rest"). It is all about belief and unbelief. Those who do not enter God's rest do not enter due to their unbelief.