Professor not responding to my mails after earlier discussions
This happens a lot to the super busy profs. They are too famous and receiving too many emails in their mailbox. They could easily forget about them especially if they are old. Sometimes when the email is hard to response (in your case, the decision is really hard to make), things will be getting worse. They will think about it for a moment, then something else comes up like a telephone call, and then they totally forget about your email. 

Two things you could try:


Ask him exactly what you need, like an appointment
Ask his assistant about appointment
Do not over estimate yourself. When talking face-to-face, many profs are always saying positive things about you just because they are polite.