The site is secure (https) so your communication to and from the site is encrypted. That means I am using current best practices to keep your data private. But let's not fool ourselves ... your government (or a man in the middle, or any other hacker of sorts, most notably your ISP who is selling your browsing behaviour data for big bucks) might still have ways to see what you are doing here. I don't have their infrastructure abilities, unfortunately, fortunately.
I can't speak on behalf of services like Google Analytics and others, but I personally can promise that any data I get from you stays with me, full stop, simple.