It would make sense that any deep emotions would be mostly lacking in animals that aren't really social and don't provide any sort of maternal care. They don't depend on anyone but themselves, so they don't need to form relationships or bonds, etc, in theory. In practice, however, it is evident that some examples know their keeper and enjoy their company, by coming to greet them and slither up their arm or whatever. However, that doesn't mean they would be heartbroken if they never so you again lol