Hi, it sounds like he probably isn't the kind of guy you hoped he was or wanted him to be. If that's the case it's probably really good that he's showing you that now and giving you the opportunity to move on and, when you're ready, find someone better for you.
But firstly, why not check in with him and tell him how you're feeling? Afterall there might be something wrong at his end or there might be some compromises you both can make if he just finds it hard to be as "expressive" as you.
But if not then hey, more see it as he isn't living up to YOUR expectations or standards as opposed to the other way around. And give yourself the chance to meet someone who's closer to the mark for YOU.