Go for it!!
I know from being on the other side, sometimes sororities have to make choices that not everyone in the sorority agrees with. Give these girls the benefit of the doubt and talk to them. Not about the rush process or about what happened, but about them and you and your friendship. If you make an effort to be comfortable around them, they will to.
Also, just because you don't get preffed by them, doesn't mean you can't be picked up on bid day. The selection process is very complex. No one has a guarantee until they have a bid in their hand.
OH! And keep in mind that everything happens for a reason. If you don't get into the house that was #1 on your list, there is a reason. You belong in the house you get and accept a bid from. Trust me on this one. ADPi was not my first choice when I started rush, and they weren't the only ones I preffed. But together we have made a great combination. I am true blue to the core and would not have it any other way. I always tell people they'll know they are in the right house, when they walk in and can see themselves there for the rest of their life.
Good luck!!!