At the very least, you do not know this guy well enough to go making marriage plans with him. Knowing someone takes time spent together. A lot of the time since you met him, the two of you have been rather far apart . . . so that doesn't really count as time "together." As you say, you've been physically together for 6 months. You got a lot to learn about this guy. Meeting his family through "Skype" is not actually meeting his family. Slow down. You've been allowing him to rush things, and you've been rushing things. This is your future life that we're talking about. Employers put more effort into checking out the background of a job candidate than you've put into knowing this man.

Just stop thinking of him as your future husband for now. Think of him as someone you're dating to find out who he is. He may be a very slippery character. Maybe you already know enough to want to get out of this relationship. If not, then find out a lot more. See what kind of background check you can do of him on the computer. If he objects to that, too bad.