It's funny - I'm usually more confident in the relationship when there's time spent apart. When someone misses you, you're exciting and fresh, and you're thought about & longed for.
When you're with someone all the time, why think about them?
Plus, you probably just had sex, so what's to long for?
Patience, though - I've learned over the past few years (various things have tried my patience like nothing I could have imagined) that it just takes practice. Most here will probably agree. It's just something you get used to.
Watch - after a while, if he's around for an extended period, you'll be like, "Uh...don't you have somewhere to fly, or something? I want to miss you."
