Anyone have help for heartbreak?

Well in the last month i started hanging out with this guy from work. we both told eachother we had feelings for eachother and then he deeked out and said he was unfit for a relationship since he had too many "issues". in one of our convos i told him all these wretched things my ex best friend had done to me. next thing i know him and her are even better friends then they were before we were hanging out and he refuses to have a relationship with me out side of work anymore. i dont get it...i dont feel like there is a god when things happen like this. on top of all of this...i have crazy feelings for him at work which i dont really get cuz we dont know eachother that well but its like whenever he looks at me WHAM. and hes just totaly rejected me. i finally stopped trying, and sending him text messages to find out what was wrong....about a week ago.. what else can i do to try to figure it out or try to get him to be my friend and maybe date me and not be friends with that aweful girl who tried to ruin my life and stab me in the back?