Is this a good reason to be mad at my boyfriend???????

Ok so long story short: Im a vegetarian and I have an eating disorder (bulimia). My bf has a drinking problem where he gets drunk and arrested often. We both made a promise 2eachother. He said that if he goes w/o drinking 4 a month, i would have to eat meat and give up my ED. Yesterday he broke his promise and got drunk with all his friends. He called me several times 2day but i didnt answer him bcuz i was so mad. Do i have a good reason 2b mad or am i overexaggerating?