I have 2 really great friends that I grew up with through school that I remain close with individually. When we were younger, we were all a great group of friends to hang out with. As the years have gone by, my 2 friends have grown apart from each other and have had their number of fights and differences between them. I want to ask both of them to be in my wedding, however, my biggest fear is that they will not remain civil with one another on my special day. It would mean the world to me if they both were there. Long story short, I am sending out personalized bridesmaids invites. Would it be inappropriate or rude to address my concern in a polite way to these 2 girls that I would love for them both to be in my wedding as long as they can remain civil with one another on my special day. Is that going overboard? Or should I not say anything at all and hope for the best? I feel as though if I lay things on the line from the start, then I don't have to feel bad saying "I warned you" later if things go bad.