It sounds like your buns are doing well! I do think that it is time to have them meet officially. One way I like for rabbits to meet is on a table. Place a towel down and plunk them next to each other. You can start by doing some forced snuggling where you keep them together while petting them. This will calm them down and allow them to meet in a calm manner. Then let go, take a deep breath, and watch them interact. You may want to keep an oven mitt near just in case you need to break up any scuffles.
Check out http://www.thebunnyguru.com/care-guide/bunny-bonding/ for more ideas on this.
I think this will go well, just remember to take a breath. I know it is hard, I still have anxiety over bonding rabbits, but it really does help to relax a bit. Maybe have someone to talk to while doing this to distract you so you don’t get too overwhelmed, or put on something funny on the TV at a quiet volume.
Good luck and let us know how it goes!