<human>: Can you give me a shortened version of the text?

We have been dating and living together for 3 years. F27/M30. At this point we're practically married, we're just waiting til we have less debt on both our sides to commit legally. His family has been rather accepting of us, all but 1. His sister never liked me. Told him she didn't like me after the first couple months. Whatever, doesn't hurt my feelings. I still go to a majority of his family events (been to all 3 Christmas', 2 thanksgivings, 3 easters, birthdays, you name it.) and get to know them and hang out.

Well, said sister is getting married this spring. I wasn't necessary expecting an invite, but I also wasn't expecting a de-invitation. I'm not invited and only he is, no date. 

Its brought up some arguments with us. He claims I don't go to "enough" family events to warrant an invite. Most random hangouts happen on Sundays when I work. He says I should take off if its that important to be with his family and I shouldn't be upset she didn't invite me. 

But I am. Because I go to his family, mingle and put myself out there and feel this is a sign that it's not doing anything and there's no point in continuing. I don't know how to react (aside from the resentment I feel) when one of his family members basically says I'm not good enough to attend this event.
<bot>: boyfriends sister said I can't go to the wedding and boyfriend says I probably deserve it for not attending "enough" family events