The three of us have been friends for 10 years and they are both like my brothers. Let's call them X and Y.

In our University we have a way to graduate that you need to implement a project in a company and after a year you present the results to a committee of professors that evaluate if you are able to get the degree. The examination is very stressful and you need a public of at least 10 witnesses to be valid. So usually family and friends attend.

A month ago Y's ceremony happened and I was there but there was no sign of X.

I asked X what happened, because it's really strange that we all miss a big event like this. He said that he didn't wanted to go and I asked for his reasons.

He told me it was because we didn't attend at his ceremony last year.

\-Let's go back a year and a bit for a minute.

2 months before X's ceremony he told us that he'll be telling us next week the day it'll happen. Me an Y waited for that.

A week passed and we got no info. I didn't asked because I thought maybe he hadn't the info yet.

More weeks passed and his event was not in my mind at that moment and then I saw in Facebook some pictures of his ceremony. It didn't bother me, because I thought, well he had his reasons for not inviting me.

\-Coming back to the present in Y's graduation.

When he told me that he resented for last year I got mad at him.

Me and X discussed and we got to a dead point where he told me he DID told us the day and we didn't bother to attend, and I told him he DIDN'T told us and he didn't invite us formerly so we had no way to know.

I quit the discussion and gave him the benefit of the doubt, but later I asked Y if he assisted X's ceremony and he told me that he was waiting for the info too and that his mom saw the photos on Facebook and asked him about why he didn't attended.

I argued X a second time telling him how Y was also waiting for the invitation and the only response I got was "If you both had care for me maybe you would have asked me in the following weeks for the info."

I lost it at that moment and told him that was stupid for his part because he told us he was about to get the info and informed us in the following weeks.

Y is laid down dude and he didn't got angry to X for not going to his event, even though, it was really sad to see him waiting for X and he didn't appear. That's why I am mad to X because he got his ego before joining us.

I know that in his point of view we failed him too, but resenting us 1 year and playing the resent card is not healthy for our friendship.

My wife's been telling me that i'm also putting my ego before and that I care more for an apology to Y than Y himself.

It's been a month from that and we haven't talked to much, only for recent important issues and I fear that our relationship will break if we just ignore the issue even more.

I just need to know if AITA for expecting that apology to our friend.