Kind regards or Kind Regards
This is just a slightly less formal way of ending a letter, to be honest it often doesn't have any relevance to your actual feelings for the person. In some circumstances I would use it to a complete stranger. Just because someone puts kind regards on the end of a letter I wouldn't think they particularly care about or respect me, it is just one of the standard sign-offs.
You can also shorten it to Regards, but this is a bit abrupt, and I would be more likely to use it in an e-mail to a business acquaintence I deal with regularly.