First just wanted to say I’m sorry about the loss of your female. 🙁
Neutering in males is mostly for behavioral reasons, usually things like poor litter habits, spraying, and aggression. Excessive nipping and mounting attempts can also be obnoxious. Unfortunately, unspayed/neutered bunnies are often surrendered at shelters for the same reasons that can be solved by neutering.
So if your bun is starting to act out (is being aggressive or spraying, etc.), then it sounds like neutering would really help his behavior and help him be a better and happier house pet. Neutered males tend to be more calm because they aren’t just looking for females all the time.
Neutering is also usually cheaper and less invasive than spaying, so perhaps you can work out an agreement with your parents for them to pay for it and you can save up and pay them back over time?
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.