If you get another bunny, have her spayed first and heal (about a month) to allow the hormones (if any) to dissipate. Also, take the introductions slowly! Have their cages near each other enough to see and smell each other but not bite through the bars (leave 3-4 inches of space at a minimum). Find neutral territory (your home or another person's home) which your own bunny hasn't been in before and hasn't claimed as his own. Equip yourself with a water sprayer to ward off any fights and watch for any signs that a fight make occur (nipping, circling, grunting, growling, tails up and ears back). Ignoring is a good first sign.
You might want to start by stressing the bunnies--I carried mine around in a laundry basket and put them on top of a dryer turned on to no heat (so they don't get burned or overheated) or a washer on spin. I did this in five minute bursts as they had fought previously, then slowly introduced them again in the laundry room. When they were one the floor, if things got nippy but not out of control, I'd gently tip the laundry basket over one bunny until things calmed down enough, and try again in a minute or two. You want to try for them *never* fighting, because that can damage a bond, and set you back weeks or days in bonding. That said, mine fought, and are bonded now. It was a quick bond (a week) but it was an intensive week of bonding--several sessions a day. When they got to ignoring each other and not attempting to fight, that's when I went for longer sessions.
I would consider adopting an already neutered bunny so you don't have to go through the "wait for hormones to die down stage". I adopted Simon, my second bunny, already neutered. Olive was my first bunny and 10 weeks old when I adopted her--I had her spayed at four months and then waited until she was six months old to bond her. I was originally going to keep her as an only bunny, but like you, wanted to bond her to another bunny so she'd have company.
Good luck!