First of all I just want to say that I am nowhere near asking any of my girls to be BMs yet, since my wedding isn't until June 2012 and I've lurked on here long enough to know why that is a bad idea. I just like to have a plan on everything I'm going to be doing, and lately I've been thinking a lot about bridesmaids (vendors keep asking me about it). I definitely won't be asking anyone for a few months, I just was hoping to get some advice from you ladies before I have to make any decisions.
I will be having my sister and best friend (might as well also be my sister) as MOHs. Besides those two I'm sort of struggling. I lived with 5 girls the full four years of college and we were very close, however since graduating I seem to have only kept in touch with 3 out of the 5. So originally my plan was to ask my sister and best friend to be MOHs, then have those 3 as bridesmaids. However, FI has two sisters that I feel obligated to consider.
One is about 7 years older than me, she isn't very close to FI, but her daughter will be our flower girl. I've really only spent a few days over the 4 years we've been together around her, so I don't know her well at all. His other sister is only a couple years older than I so we tend to have more in common. She's engaged as well so we're really more at the same place in our lives. She talks to FI at least once a day, so I really thought he would want her in the wedding. Although I wouldn't really consider her a friend, I do like her and can actually carry on a conversation with her as opposed to the older sister.
I've talked about it with FI numerous times and he doesn't think we should ask them, but he also is the type of guy that doesn't think it really matters. I'm afraid of the possibility that they'll hate me forever if I don't ask them (they're very petty, if his mom buys one something, the other one has to have it too). FI thinks I am overthinking it and that they won't care either way. I don't really know them well enough to figure out if he's right or not. We are from different towns, so there isn't much possibility that I'll get closer to them over the next few months, because I rarely see them. The one thing that keeps making me rethink our decision to not ask them is that family is very important to me, and although I don't know them well, they will be my family for the rest of my life.
So I guess my question is, what would you do? Would you ask even though your FI thinks you shouldn't? Do you think I should just trust FI that not asking won't cause a rift in my relationship with them in the future? Thanks in advance ladies, I'm really torn about what to do and I generally agree with the advice you all offer so I'm hoping this will give me some guidance.

June 2012 Siggy: Favorite Engagement Picture!
