I think it's strange that he would tell you all those things too, but neither I nor you know his situation or really his character. Remember that beauty is sometimes (though not always) skin deep and words (though also not always) are cheap. Don't try to have a relationship with someone who doesn't clearly have your best interests at heart. That would include playing with your heartstrings like this, though sometimes, guys really aren't thinking that deep and they really don't realize what you see or feel.
It's not weird to picture yourself dating him, everyone has thought about particular guys, whether it's a feasible thing or not. It's good to be somewhat guarded particularly at your young age because it is hard to judge characters and might take much more time to get to know someone. You did the right thing to not talk to him yet and ask for help.
If you find yourself in that situation again to talk to him, you can do that if you want, but ask yourself questions now and search your feelings for him: write a list (be truthful to yourself!) of the reasons why you like this guy over others and list any reasons why it would be a good reason not to talk to him. When you have it on paper, it's easier to see more clearly when your heart is beating and fluttering with emotion.
Oh and don't let words fool you: I know this to be true: the right guy will recognize you for your outside beauty as well as your inner beauty and will always been looking deeper....