Not necessarily, though it is highly recommended to keep at least two guinea pigs. If you can handle and play with your guinea pig at least one hour a day, though your guinea should be fine.
You don't need a guinea pig.
yeah
Obviously you need another to breed so put up posters asking for what you need. Maybe put an add in your local paper.
I need to feed my guinea pig.
They do like company and would definitely prefer another guinea pig with them.
You need to talk to a veterinarian to have your guinea pig spayed.
Yes, i bought one Guinea pig and added another around the same time, and they get along great.
yes, but don't be surprised if the Guinea pig rejects it too. but it might not
Rabbits/Bunnies do NOT make good cage mates for Guinea Pigs. The Guinea Pig needs another of its own kind to thrive. Even if it does have another Guinea Pig partner, the Rabbit/Bunny may try to kill, hurt, or eat them. I hope this answers your question!
Yes and fast
If you only have one guinea pig get him/her another guinea pig friend of the same gender. It could be lonely.
Basically a crossbreed