Well PIPSMOM, rather than calling you a bad friend, I have finally thought of some useful advice.
I know that I expected way too much of myself when I brought home the baby. I had not really planned on spending my entire day on the couch with the baby.
I think that talking to your friend on the phone is a great way to support her. Let her vent to you. Offer to print out info about bfing after a C sec and send it to her. Acknowledge that what she is doing is hard, but worth it.
If she needs something to continue a healthy bf relationship, but can't afford it, offer to buy it for her. Like if she needs a hospital grade pump, offer to pay the rental fees for her.
Give her a good book on bfing and direct her to the local LLL and this website for support.
Try not to say stuff like, "I bf when my nipples were bleeding" if she tells you she is in pain.
Take her meals, buy her a boppy pillow, make her a nursing basket, offer to stop by to chat or help do the dishes or whatever she needs done to keep her sanity. A messy house is stressful.
If she doesn't want anyone to come by or call, respect that.
If you offer statistics or studies, verify that the research is recent and the source is reliable. (ie. not trying to sell you something)
So far that is what I have been thinking about.
I realize after rereading your post that you are not going to abandon your friendship if she chooses to formula feed, rather that you will not support ffing.
"Love's the only house big enough for all the pain around here."