The one i want! But doesn't want me!

Hi ladies I'm feeling a type of way can i vent for a minute? ok so I've been talking to this guy for almost a year now. and everything was going great but a few months back he strated to acting different we will make plans and he will stand me up he even stood me up for my birthday. crazy right! yes i know but he knows how i feel about him he says he cares but don't show it like he once did. i think about him from time to time but i seem to get sad at the same token just because i know that he's talking with other girls. recently someone send me a pic of him in their bed and wrote do you Still Want him? so that messed my head up. I've never done anything to this man but be a good friend and a lover so ladies i ask why would he let some one do that to me knowing how i feel. and his words were sorry i didn't want that for you umm what!