Ladies how do you all manage?

When you're around your boyfriend a lot, and stay with him usually every night and talk throughout your day.. When you have to go somewhere or be gone for a few days, is it hard? Or do you find yourself really thinking about him and missing him? I'm missing my boyfriend like crazy right now, and I think he fell asleep on me, I trust him but it always crosses my mind "is he with someone else"? But that's just how I think a lot. Is that crazy of me?