I dont have anything to add to what has already been said about h and your b/day, I understand it from both sides. I am sad you are feeling so hurt by his actions ....or inactions as the case is ... you had an image of how the day would go in your head and it didn't happen, so the disappointment is very much felt. The golden rule M, no expectations - easy said than done I know, its a trap I fall into often.
You had a really lovely vacation and felt the connection, even as just a friend, so to have h retreat and go back to his own world really does cause confusion and yes, rejection. Its the worst feeling and each time it happens you will question if he is really the one, if he is really worth it, but m, don't make any decisions now, be patient, keep going forward on your own path and focusing on your future and allow your h to work out his own. I know its hard and I myself am terrible at practicing what i preach, but try to remember, when he says and does things that you feel are hurtful, your h generally has no clue that it is, he is most likely not doing it intentionally, his thinking is completely out of whack right now.
Look after yourself M, treat yourself kindly this weekend.