I believe you mean: "It is the first anniversary of my boyfriend and me." Honey, there ain't such a thing as using "I" as an object.

*sighs* When using and, you always put yourself last and the person you're talking about first. OP Did this. Second, to figure out if the sentence makes sense, you remove the "and" and make two separate sentences. If the sentence made grammatical sense by itself, then it can be put together. >> "Today, it is my boyfriend's and my one year anniversary." becomes >> "Today, it is my one year anniversary" and "Today, it is my boyfriend's one year anniversary" Your sentence would be >> "It is the first anniversary of my boyfriend and me." becomes >> "It is the first anniversary of my boyfriend" and "It is the first anniversary of me" And myaccount11's sentence would be... >> "it is the first anniversary of my boyfriend and i. " becomes >> "it is the first anniversary of my boyfriend" and "it is the first anniversary of i" The op is correct and both of you are dumb. Also, ain't is not a word. Isn't, is. Ain't is a colloquialism and makes you sound dumb. Lastly, myaccount11, don't correct someone's grammar if you don't know how to capitalize letters at the beginning of your sentences...

#156, you are a failure. I'm sorry, but little grammar tricks do NOT replace actual knowledge. Firstly, putting yourself last in a list of subjects or objects is not a grammar rule; it's only to be polite or respectful. Secondly, I did not say OP's grammar was incorrect, because it is in fact right. I was only correcting myaccount11's proposed grammar change, which in turn was very wrong. Furthermore, my use of "ain't" was purely for mocking myaccount11. Now, for your very thoughtful breakdown of our sentences, you've given what they would look like if separated but have not even ATTEMPTED to prove any perceived incorrectness. "It is the first anniversary of me" sounds awkward at best and awful at worst (and nobody in one's right mind would actually express it like that), but is technically right. "I" is a subject, "me" is the form used for direct and indirect objects, and "myself" is used as an object only for sentences in which the first person is both subject and object. I'm not sure I can trust you to figure out how this information applies, so I'll let you know: in a sentence like "the anniversary of [the first person]", the first person is the object. That's when one uses the form "me". I'm not going to call you retarded like I normally would to someone who fails at correcting grammar (I'm looking in myaccount11's direction...), because you seem to have at least an average understanding of it, but you are FAR from qualified to be correcting anyone until you make damn sure you know what you're talking about. You make yourself sound very hypocritical when calling others "dumb" in such a situation.

#165: While I agree that your correction did make a change to something grammatically correct and don't think you should have been so rudely attacked for your post, I don't think #156 was arguing about "me" being the wrong object or whatever. I think that person just assumed that you would realize that the actual phrase "the anniversary of me" doesn't really mean anything, unless you're talking about a birthday... in which case, regardless of your grammar, the sentence doesn't make much sense.