My two best friends and I had a date to go wedding dress shopping for me (first time I've ever gone). My maid of honor is from out of town so she spent the night with my other friend and I, and we had plans to go look for dresses the next day. Well the next day came and they woke up 3 hours later than we were planning to, and then my bridesmaid said she didn't want to go wedding dress shopping she wanted to go back home for the day to visit her parents. We didn't have an appointment, it was a walk-in store but then they start saying how they want to go shopping for their dresses instead. I'm trying to get us all on a good day to go because the place I have decided I'd like to go shopping at requires an appointment but when I mention it to them they just act like it's not a big deal or as if they don't think we're really going to go so they're like "okay whatever." I know I'm way more excited than them about it, after all they aren't getting married, but when I said "How about this day?" they were both saying how they were planning on going back home to visit their parents (we're in college so they go home a lot).
I try not to make big deals out of things so I'm kind of like okay well we'll find a dress we still have time (wedding is in 9 months), but my fiance and another friend of mine says I have to put my foot down and tell them a date when we have to go because they both agreed to be my maid of honor and bridesmaid. I purposely plan it around their schedules so they aren't inconvenienced. It's just not my character to "boss" them around and be a bridezilla telling the when to go shopping with me, how should I approach this to them without sounding mean? I really like things done ahead of time so I don't stress out later, which is why I want to go this early and I hear most people shop this early anyway for wedding dresses.
EDIT:the thing is they really wanna go, and if I say I'm going without them they get upset...but when the time comes for them to come with me they dont wanna go.