Seeing my boyfriend for the first time in ages and he called it off.?

I havnt dated him for 3 years now we're together i was supposed to see him today for the first time in ages! he called it off in the morning he told me on facebook he couldn't make it sorry, talk soon. ? should i be pissed and worried, maybey he dosn't really like me and he says he likes me and he would never leave me and hes lucky to have someone like me, but i'm just not buying it im not sure what to think, what do you think and if your a guy what do you think ? Oh and by the way iv'e been on a diet, and iv'e been losing weight FAST my goals 60kg, and im 79 kgs but i'm going down ****** fast! but yeah i'm not sure how to get back at him, and we're dating we decided to get back together, and like he said we would go to hes and watch movies and all the rest but it didn't happen! i'm scared im doing something wrong he dosn't talk to me much on fb or anything like i'm not sure whats wrong? ... maybey i'm not good enough :/ :( i need opinions! we're virgins so hes not after . And hes so sweet when i talk to him . and on the phone it was like talking to a friend :/ i'm not sure we havnt been together for 3 years so we're meeting up for the first time today but he cancled it and all he said was sorry babe can't do it today gtg talk soon? I NEED HELP :( i'm worried.