Rabbits are incredibly social creatures and should never be kept on their own. We urge this point strongly as a rabbit will always seek attention from a fellow bunny as opposed to its human owner (regardless to how much attention you give them) if given the option. Rabbits, like dogs, instinctually abide by a pack mentality and so it is far more natural for them to have fellow rabbits for companionship, stimulation, snuggling and grooming. Also they can seek this from each other 24 hours a day (not just when you are awake or have the time to give them attention). That’s why we say, 2 are always better than 1. Also don’t be fooled by ’cute’ video clips of rabbits with cats or rabbits with guinea pigs etc, no matter how endearing it appears to us - rabbits have a silent language and what is interpreted as an action to us is often something entirely different for them eg. the lowering of their heads in what appears to be a submissive or cuddling manoevre is rather them asking for a head or an ear groom. It is unlikely a cat, guinea pig or dog (or even human) will properly understand this body language and so respond to this request.
The best option is to adopt a pre-buddied pair from a rescue centre. They will already be neutered, which is essential for successful bonding and to ensure no future baby bunnies, and a bonus in that its an operation and expense you don’t have to finance! But we normally find people have a lone male or female and they just want to find them a companion. If this is you, we strongly suggest you seek a mate through a rabbit rescue centre as their personality and temperament are evaluated by the centre making it easier to find the right personality match for you existing bunny. And to reiterate - most rescue centres are responsible in neutering all their residents before rehoming.
Here are some tips on finding the right buddy for your bunny, and a step-by-step guide on how to make the union of your rabbits a joyous one.