Boyfriend of 8 years to sister of the bride and bridesmaid not invited

I saw a lot of the reverse of this question (as this forum is for brides) but I am truly dumbfounded by my sisters audacity.

i have been dating my boyfriend for 8 years - some of my family is not exactly in love with my boyfriend. A lot of them think I can do better. He is not abusive nor a lunatic a hazard. Heck he already told me he would be the DD for the wedding so my family can have fun. He is blue collar and my sister has moved to the city and works with “elite” people and she has some how forgotten where she came from. Her and I have had issues in the past because of how she acts too good for our family and is basically embarrassed by us because we don’t come from trust funds and we don’t act like politicians on a campaign trail.

Recently , however, we have been getting along. Until now, she is not inviting my boyfriend of 8 years and didn’t even bother to tell me. We are 4 months from the wedding. I had to ask (thankfully my yougest sister gave me a heads up) and her reasoning was not having enough money - but she has over 12 “co-workers and their significant others” invited (men who are probably 25-30 years older than her that she never associates with outside of work and is doing it solely for looks). She also mentioned because her boss will be there she isn’t comfortable with my boyfriend being there. Because my brother and him playfully wrested at Christmas?? (when we were all drinking - and hanging out, not a Christmas dinner)

She also isnt inviting other extended family members because they “talk too much” or other various reasons she somehow justifies to herself.

im her sister and supposed to be bridesmaid...is it not totally out of line for her not to invite him? I get you don’t like him, hell im not fond of her stuffy fiancé who she has known for less than a year.

Would it be wrong for me to decline the invite to her wedding? ( I just got this news last night I’m still fuming.)