My FH is incredibly shy, and he's having difficulty asking his groomsmen to be in the wedding (even though one of them is his brother and another one has been a friend since they were both 5 years old). The wedding is in 8.5 months, and he FINALLY asked his brother to be his best man a week or two ago, but only after his mother cornered him and told him that his brother didn't think FH wanted him in the wedding party because we were so deep into wedding planning and he hadn't asked yet. FH's brother is not a particularly emotional guy, so for his feelings to get hurt over something, means that that something was pretty serious.
But now that he's asked his brother I feel like he really needs to move forward and ask the rest of his groomsmen, lest they ALSO conclude that FH won't ask and become unnecessarily hurt. I have been gently nudging him to just get it over with, but he is resisting, and I don't want to nag but I'm becoming genuinely concerned. One of the guys he wants to ask lives in the UK and will need to arrange international airfare. This is becoming a huge source of anxiety for me, but maybe I'm overthinking it. So my main question is... am I right to be worried, or does he have plenty of time? At what point is it "rudely" late to ask a groomsman?