Well, snakes may not feel 'love' as we humans are accustomed to it, but they do feel security and comfort, fear and stress.
I also believe that they have a way of 'recognizing' their owner as opposed to others who handle them. This was shown to me first hand just yesterday when my dear BF decided he was ready to try holding Nagini for the first time. He's not afraid of snakes...just wary. She had been cruising around on my arm, flickering and such, but when I handed her over she froze...even though Ari is warmer than I am. It was interesting, and I had to reassure Ari that he hadn't freaked her out or anything, she just didn't know him.
All animals have feelings and emotions, they just aren't expressed or felt in the same way as humans.