Oh come on, you're not even trying... This is what your stats look like: 2 comments (in 4 months you only posted 2 comments?), 14 favorites and the list goes on... No wonder you only have 2 watchers, even though I think your art is amazing!
The way I got half of my watchers is that I kind got connected to them. You find a picture of something you like, comment how awesome it is and add that you love the shadowing or whatever you like about that painting. When/if the "maker" of that painting replies say you like his/her other work too, and give him a watch, he/she may watch you back. The other half I got over and featuring my work in groups. I see none of your paintings is featured in groups, you should do that!