I was in the same boat. I am a full time student applying to law schools and just took on a second job. I just felt so guilty leaving my bun alone all day and then some nights. Ultimately decided to get a second rabbit and bond them.
If you do decide to bond, definitely take your bun to check out others. Get a feel of different rabbit personalities and see which one would go best with your rabbit. I did not take nearly enough time in choosing my second, and although this pair is not doomed, I can tell that my first bun is not enamored with the second.
Also, bring the second rabbit home either a week before a holiday or during the holiday. I brought Wally home a week before Thanksgiving break, and that was a poor decision. I did not have a plan in bonding them, tried to go too fast too soon, and I got extremely frustrated. My advice would definitely be to wait until you have a 2-3 weeks period of holiday or a down-period so that you can be relaxed and patient and consistent. They definitely work better on a schedule.
Make sure you keep their individual hutches for the initial bonding period! Mine had to be housed separately for about a month. Now they are still housed separately, but I created a hutch out of the grids so that they are as close as possible but with their own separate room.
Bonding is work, but if things work out, it is worth it.
Good luck!