How should I feel about this?

Me and my boyfriend broke up a few months ago while he was in the academy(Corrections Deputy) and we recently started back talking but not really officially back together. His graduation is next week but I wasn't invited. He says it's not that big of a deal because its going to be lame plus I have to work(but he doesn't know that). Im kinda upset but idk how to feel about this. Any advice?