He thinks you are too needy and I also get that he is really focused on his career right now. Did he suffer a loss or setback recently? If not, he is very driven by material success. You really need to back off for now and give this a rest. Your worth is not tied to whether or not this one man wants to be in a relationship with you! Give him his space and work on yourself for right now. It's like that poem, "if you love something, set it free..." If he does not come back then it was not meant to be, my dear. Really - just do yourself a favor and release your anxiety over him for now. Being overly emotional about it will only make it worse - he wants a strong woman in his life.