I can't sit on my sit bones
Yes, there is hope for skinny people like us.
Please keep in mind that sitting on a saddle for miles/hours on end is never going to be totally comfortable. I'm sure I will get flamed for this but I'll go ahead and state it- there is no such thing as a comfortable saddle. Saddle choice is a matter of mitigating discomfort, not enhancing comfort. 
The two most personal choices people make beyond the bike they ride are shoes and saddles. These two items run neck and neck in terms of personal  the preference is. What works for one person may be an instrument of torture for the next and vice versa. Helmets are a not-so-distant third.
What you need to do is try different saddles. Keep trying different saddles until you find one that you deem bearable. Give them time. Someone once told me that "you don't break the saddle in, the saddle breaks you in," and that holds true for pretty much everything with the exception of a certain brand of English fame known for their leather saddles. Unless the saddle is excruciating to sit on for the first short ride, give it a couple weeks of regular riding or a month or so of sporadic riding before you conclude that it's not right for you. 
This process can be expensive.
Road saddles are much more difficult than mountain bike saddles because you spend more time on them and move around on them less frequently. I've been riding regularly for many years now. I still haven't found a road saddle that I'm happy with. I have the same mountain bike saddle on every other bike I own except my road bike.

The longer your ride and the harder your ride, the more uncomfortable you will become regardless of your saddle choice.
More padding does not equal more comfort. Do not forget that. That goes not only for saddles but for shorts as well- and everything else involved in a contact point with your body for that matter. Just because something costs more does not mean that it will be more comfortable- same rules apply here as well.
Don't underestimate the value of a good pair of shorts. You probably shouldn't pay less than $60 for a pair and you should do your homework on what makes/models rate well and which dont. There is some personal preference involved with shorts but it's not to the same degree as with saddles. Typically if they rate high you will be happy with them. If they don't you might be better off sticking cardboard down your shorts (I've owned a pair of shorts like this that weren't that cheap). Bad shorts can make a good saddle feel more uncomfortable to a degree, but the best pair of shorts cannot make a saddle that does not fit you comfortable.
To close, I will reiterate that saddles are not very comfortable to begin with. What you're trying to do is find one that limits how uncomfortable you become as your ride progresses. Try enough different ones and eventually you will find one that works. Best of luck.