Leave it to him to text you because you already texted him back last. You don't want to be the one texting more and not getting responses back. It will make you look desperate. Now it is in his hands to respond back to you if he doesn't because he said he is so busy, stop contacting him period until he shows you more effort. No matter how busy a man is, there is 24 hrs in the day, he could make time if he really wanted too. A text or a call doesn't take much time at all, a few seconds. So, right now, you just leave it alone and if you hear from him, don't respond back so quickly. Make him wait a bit and then you can respond. Asking what happened to you or why you didn't call or text me back is the wrong thing to do. You don't want him to think you were just sitting around anticipating his calls/textts, ok? In cases like this, when you notice a change in behavior or time spent due to bein "Busy', usually says that he is losing interest or has already lost interest. Some people let you know that by telling you st8t up or like most, they show you by there actions which aren't much like your situation. There's nothin you can really do about it but move on and if he texts randomly every now and then or ask to see you after so long, you decide whether you want to do things that way with him but don't you do it all and chase him. Let him chase you to where he wonders about you and if he really wants you, he will show you more than he tells you.