So FI's little brother (just turned 21 last week) is getting engaged tomorrow. After high school he became super religious (they were not raised very religious) and admits he just doesn't want to wait to have sex. He asked us if it was okay with us if they get married a month or so before us.We both said we would appreciate them waiting because the month or so before our wedding is going to be crazy. Almost all our guests are OOT, we have to meet with all our vendors, etc. It would be hard to be a part of their wedding and help with their planning while getting ready for ours. Plus it would be hard on the family traveling from out of the country to come twice in such a short period.FI's family is very small. FBIL and his almost FI live within an hour of FI and their dad. Yet we only briefly met this girl at our engagement party so we expressed to FI's brother that it would mean a lot to us to get to know her before the engagement. Well, they've cancelled several times including calling 10 minutes after the brother's bday party began at our place saying she had cramps so neither could come.I don't know if I am overreacting or being bridezillaish, but I am feeling grumpy about going to their engagement thing tomorrow. I know it is not my place to have an opinion, but I don't understand why they both don't just finish school, get jobs, and then worry about getting married and starting a family. Sigh. Am I being ridiculous? I think I am just taking it really personally that she doesn't want to make the effort to get to know us.Advice?