Male - female friendships and complications?

Communications is always the key here, be honest with him and insist that he be honest with you. Then you will be sure where this is headed. Sounds like is just afraid of a commitment for now, age and height is not a problem with most. He likes your personality, so what is stopping the two of you? Either move ahead or quit wasting your time on him, unless you just want the friends thing to last also. Good luck with your choices. Sorry if I could not give you more encouragement.