A couple of thoughts on assist feeding... Don't use the foods Booger usually loves. Some cats develop an aversion to the food that you use to assist feed. Save the favorite foods until she's feeling a little better so they will tempt her to eat on her own.
Try using baby food. Gerber or Beechnut Stage 2 foods are only meat and broth (Gerber has some cornstarch) and are both in the low carb range and many cats really like baby food. It may tempt her to eat on her own. It's also very easy to go down and is digested easily. However, it is not nutritionally complete for a cat so a solid diet of baby food for a prolonged period isn't a good idea.
There are some liquid foods that may work, as well.
Foods like rotisserie chicken or anything similar if Booger likes 'people' food may also be tempting. Sometimes, all it takes is stimulating a kitty to eat helps to start the ball rolling.
As for your friend, I'm going through a similar issue with a very close friend over an upcoming home purchase. She thinks I'm spending too much. Her initial comments were harsh. At some point, she said she was trying to be protective (it's been a tough year for me). It helped to have an understanding of where her comments were coming from although I did let her know that I found her style of communicating rather off-putting. If this is a relationship you care about, hopefully, you and your friend will find a way to work through her comments.