I'm interested but I'm not

I'm dating this guy in the beginning I was crazy about him but now as time goes on I'm starting to lose interest. The lost of interest came when I saw a photo of him and his ex on Christmas...he always tells me how me and him are going to hangout but never do. Like Friday we made plans to spend time together Saturday but he ended up going to a basketball game...and he is the one who came up with the idea of spend time together Saturday... in my mind I feel like he knew he was going to the game but still decided to make plans with me. I stayed up all night waiting for him to text me to get ready to hangout but he didn't. I'm tried of being stood up. I really wanted us to workout. In all the relationship I've been in I can never get past the dating stage to the actual boyfriend and girlfriend stage...I really wanna cry cause I try so hard but it never works.