I think you can feel love develop in a relationship. Usually when one begins to love the other, the same is happening the other way around. When you see sparks, when you get that crazy feeling in your stomach, when you can't think of other words to say and just want to say "I love you!"... I think that you can tell in the way one treats you, as well. If you don't feel loved, then I'd say that he either has a problem showing it or that he doesn't love you. Use your intuition and you will know.