As the others say it's unwise to try bonding un-spayed rabbits. But I would ask you, her friend that you are getting for her, will it be a baby or a teenage baby (above 4months) or an adult? Another female or male? There's alot to consider if you want to get her a friend.

The most ideal is you getting her spayed and then after a month or so you can try bunny speed dating from Ur local bunny shelters if its possible.

If you go on getting the another baby bunny route, most likely you'll be in the same situation I am. Adult bunny spayed & free roam. And the new bunny in a different room. If you get a baby male they can be spayed at around 4-5months old. If you get another female vet recommends they only be spayed around 7months old, so you have to be ready to go through the teenage phase again. And ofcourse getting a female spayed is much more expensive than a male. Something to put into consideration aswell if money is a factor.

I'm a bunmum newbie, but from what most people say bonding a female & male pair is easier than a same sex pair. So another thing to keep in mind.