I agree with Katnip. You never *have* to get a second bunny if you don’t want to or unable to. Rabbits are very social creatures so they enjoy the companionship of another of their kind, but with enough attention and playtime on your part, a single bun can live a long, happy, healthy life.
Some things to take into consideration: it would be best if your bun was neutered first. There is the additional cost of double food, double vet care, two separate cages/pens/supplies until they bond. Time is a big factor. Two cages to clean, two separate playtimes, bonding requires daily sessions… sometimes a couple weeks, sometimes longer.
If you know you’re not ready for a second now, definitely wait! I had my girl for almost a year before we adopted our boy. It was nice to have some time to get to know her and bond with her and get her thru the “teenager stage” in one piece.
I bet when you’re ready to take him dating (the preferred method), he will find the right bunny, even if it is several months or a year down the road…