Your budgie would probably enjoy bird company & could benefit when you are not able to be with them. The bond could change to include the new budgie but that's a healthy bond.
Your budgie can keep his bond with you but it could change to include the new budgie if they bond closely. That is a healthy bird bond but your budgie should still want interactions with you but might not want as much or be as needy.
You could have 2 budgies & relax more about having to be everything in the world to your budgie.
Budgies in general are very social & benefit from a budgie companion.
Still no way of knowing if the budgies will get along as there is a chance they may not though not too likely.
Just can't predict the future so do whats best for you & your budgie & be aware of the possible situations that may arise that you might lose some affection or even have to house the birds separately in case they don't like each other.