The whole "my snake recognizes me so it must love me" argument is not a very strong one. I could argue that a snake recognizes your scent as something that is non-threatening. Much like if it were in the wild. It it smells or detects no threats in an area, it will seek out the most comfortable spot. In captivity it does the same thing. Your scent is something they associate with no threats. While they may not associate you as an individual person that they become attached to, they do understand that with your smell comes no threat of predation. You are also warm, which in a home that is sitting at room temperature (72), they are going to seek out something that is radiating heat to be close to. That is often why some snakes will prefer to stay on you rather than roam the room. You are warm and they sense no threats. This does not mean they love you. It just means you are a comfy, warm, rock which no predators around.