Am I overreacting?

Me & my boyfriend have been together for almost three years now without any breaks! His parents are really shady although they’re “Christians”. They’ve been planning to renew their vows since the beginning of this year. Two months before the even they tell me due to lack of space I’m not invited anymore and some other teens in their family. Because they knew that was inconvenient they said we will all have a pizza party so no one felt left out. The week of the event the pizza party never happened, they claimed it would be too expensive. I didn’t complain but I was looking forward to it. Yesterday was the actual event. I have a few of his family members on Snapchat and a girl from their church and they all weren’t supposed to come as well. Everybody is there posting pictures and having a good time. I just found out that his mom called his family two days before the wedding and said they could come but I never got an call. Also, half the people she invited didn’t even show up. I was extremely hurt because I wanted to celebrate that event with them. Their excuse for everything is because me & my boyfriend aren’t married so we don’t get to do certain things. That isn’t fair, especially considering the fact that I’ve spent more time with them than half the people that were invited. This isn’t the only situation either, I could go on & on but this is more recent. My boyfriend feels like I’m overreacting. What’s your opinion?