But oil is still sticking around, and it doesn't seem like the availability of it is continuously decreasing if we look at the price of crude oil. Really, if it has been less and less available, then why do we have average prices for the last year almost 3 times lower than they were a few years ago? If there is shortage in something, its price usually surges, right? On the other hand, consumption of crude oil is also gradually increasing (though not as fast as before), so you can't say either that the prices are low because no one is any longer interested in it. How come?
Some reasons that the price isn't peaking as expected:
1. While availability is decreasing, current supply is outstripping demand (output has not decreased as oil producers did not want to give in to price) so stockpiles are growing.
2. The prices of 3 years ago were inflated and due for huge correction. It's a traditional pattern.
3. Alternative energy is cropping up. There are already some evidence that oil will no longer be used by some developed countries in future.
The question is not about why the price of crude oil isn't peaking as expected, while it doesn't even grow let alone peaking, and it is not clear according to whom it is expected to be peaking, either. The question is essentially about oil running dry, but since the consumption is still growing (though slowly) and as you say yourself current supply is outstripping demand (which also grows just because consumption directly determines it), this should necessarily imply that the availability of crude oil cannot possibly be decreasing by any means...
I fixed the formatting for you, and I hope you will fix it in your post too