@margar20,
I'm trying to figure out what the problem is.
He was up front with you about how busy he is. He calls and texts regularly. He is making an effort to clear some projects so that he can see you more often. He takes an interest in your family and in your life.
Are you on some sort of a quickie timetable, where you have four months to live and he's used up three of them by being busy (er, you do realize that many successful business people are busy by definition - it's how they get and stay successful)?
I would wait and, frankly, I don't even see anything you're waiting for. For what? 24/7 contact? Sex on demand? You seem to have all of this guy's free time. There just isn't a lot of it - and he has been honest with you about that.
sarcasm/Oh yeah, run for the hills! Honesty, success and being as attentive as he can with limited time, er, yeah, those aren't worth hanging around for./sarcasm