I think in this situation, you may have read more into his comment because of your own feelings for him? Obviously, you will be more able to tell, but unless there was anything that stood out about this comment, it doesn't sound like it's very significant.
Also, it doesn't matter why he does not want to be in a relationship with you, it will not really change things, will it? But then again, I'm a girl so you may choose not to listen to me!
Chat about results here