you already told him "I want you back" and he already told you "we should just be friends" as in "at least at the moment I have no interest in something more with you", of course, you didn't end up fighting, you didn't end up hating each other, chances are you are as cute inside and out as the first time he saw you, so yes, very likely he still finds you appealing, but either he is into someone else now, or decided that, as appealing as you are, he didn't not want to pursue you, either because he is not that much into you, or because you would be very hard to interact with romantically, like, it will cost him much effort to go from one step to the other.
not to be mean but, he told you how he felt just as much as you let him know, amd lots of girl, I dare say MOST girls, would be like "he is clueless in this flirting stage, as cute as he is, he won't do it for me", that's what I mean, perhaps he tried to be smooth about the dating thing, I am too, I am not too explicit, I like things to FLOW naturally, and they do, WITH THE RIGHT GIRL.
also, REALLY, not to be mean, but, have you friend zoned a guy? I would bet you do, and if you think you don't look back twice, there sure is one guy, a lot of girls here ask "how do I make him understand we are just friends?", they have the right to be angry, they say "friends" and the guy is still there, puppy eyes and everything, ready for any chance he has to be like "oh ! will take you to that concert :" or "yes, you can count on me", sitting there believing "she said friends but there is something more, I just see it", and the tiniest smile or look for them is like a neon sign reading "YES MY PRINCE, YOU ARE RIGHT, DEEP DOWN I LOVE YOU". While it may eventually work (being around waiting to sieze the moment) it will do you no good, even if he likes you, he is not available for you NOW, probably will never be again, at the moment he said FRIENS, and friendship is what he wants from you, and even if there is a door open you have to asume there is NOT, because otherwise you will be like those guys hopelessly waiting and borderline delutional, IF something happens later GOOD :D but don't go out with him just in the hopes for that moment, go with him for the friendship as AGREED, and if it evolves FINE.
you can always ask, the last girl I dated before meeting my beloved GF, we flirted, dated, had a good time, but she was always busy and she is distant and cold, seemed to me she wanted me to beg, I wouldnt, she is a nice girl, still a friend but I decdided not pursue her anymore, when that got cold, she requested a TALK, and up front (for the 1st time) asked "we had something going on right?" -Yes :)- "why stopped?" -we were not meant to be, I prefered you as a friend-
made me happy, for once actually be upfront, no more guessing and "plays" I told her she was attractive and nice to be around, but we did not make "click", chances are your guy feels the same.