As a side note, you don't have to know CSS/HTML to be a web designer. As a matter of fact, in most places I've worked, web designers did the graphic part on Photoshop and web developers sliced the images and wrote the HTML/CSS.
I don't know why this was downvoted, I totally agree with that. In fact, my co-founder, who is a graphic designer, knows next to nothing about HTML and CSS and I like it that way. It's his job to come up with nice designs and it's my job to make them work on a computer screen. Obviously we discuss things so he doesn't design stuff that are completely impossible to do in HTML/CSS or simply infeasible for some reason,…
IMO you are the web designer he is acting like an apprentice. I can see how you might want to insulate from the technical constraints in effort to push the boundaries, but if the design is not considering the user's interactions, accessibility, browser limitations, SEO as well as things like calls to action and the design goals (profit or throughput or whatever) then they're not doing web design.
I'd say from your description you're a web designer employing a graphic artist.
Just 'shop-ing a design and transforming it to markup and styles tends to be print design that is put online rather than web design.