Actually it's a very normal thing for feelings to not be there or definitely not as strong when away from the person....there was an article written on LOVE that basically confirms that research.....the love is blind & absence makes the heart grow stronger crap is a false thinkin

.....DON'T GO THERE. Even if he is lying to you.....at least you know what HE SAYS. Your relationship is between Mitch & you. If he decides that it's NOT something he wants to open up about......then I would definitely KNOW that he's just using you no matter what he says.
I wouldn't be too hasty in thinking that you do have a relationship with him given what it is now.....but I would sit back & take my time to see the big picture......not what you wish it to be.
When people can't be honest to you or even to the rest of the world.....it's because they have something to hide.....& I wouldn't want to be the one that's being hidden.