I don't know what to do?

I have never owned guinea pigs or a rabbit. But I know pretty much everything there is to know about rodents. (I've had my fair share of research) :) And I can tell you this: stop getting animals. If your dad is a responsible pet caretaker, he will not get another rabbit. If he's set on it, change his mind by telling him about the problems you have encountered. It seems to me that you have a bit of a problem denying animals that come into your life, and it makes sense. I have a soft heart for rodents and all animals, too. But you can't keep going on buying new rabbits and guinea pigs and what not when you have problems. This is torturing Pips. So, what I would do is let Pips live alone until you can buy a MALE guinea pig. Male guinea pigs together won't usually fight unless your cage is teeny weeny. They can fight if you own 3 or more. Until that time, maybe get him a little hanging bird toy mirror so he can see himself/trick himself into thinking he has a friend. Put Minnie by herself in a different hutch or cage, but a bigger one because it seems that she has a bit of energy to burn off. Or, if there's no way you can keep your Minnie, give her to a friend, or put an ad in the newspaper or online. Just don't give her to an animal shelter. :) Hope it helped! Good luck!