Getting rid of the wedding dress is a good sign, he is trying to have closure, he is trying to move on. 2002 to 2014 is a long time together he was in his early 20's when he met her, there would have to be alot of love there, alot.
He needs a friend. He needs company. He needs time. He needs help but he may always love her, deep in his heart and you have to allow him to as well if you want him in your life. That does not mean that he can't won't love again but never expect him to forget her.
Give him the space he wants, needs. Let him know you fully understand after all she was a major part of his life, 1/3rd of his life was spent with her. You are there as a friend and hope that one day, in the not too distant future you can pick up where you left of. But, also let him know that naturally, you are not going to wait, if someone else walks into your life and wishes to love you and you feel the same way, that's the way it is.
I have no doubt he has feelings for you, nor does anyone else but at this point in time, he needs closure at least to move on again and he's starting to try to do that.
Give him space.