It is a proven fact snakes do not have the ability to love. That part of their brain does not exist.. HOWEVER - Snakes do have the ability to LIKE. And I'm sure there is a level to how much they can like something or someone. My snake shows signs of comfortableness around me and acts in a fun and friendly matter with me. My BP Cornelius shows great fondness towards me, and that's enough for me!
This makes sense- you don't particularly need oxytocin interacting with the brain to find comfort or enjoyment in something.