Youll want to keep their cages side by side for about a month or two. Since he seems aggressive towards her, it might help to try the toy swap tactic while their cages are close. Give them both a cheap dog stuffed dog toy and leave it in their cages for about two weeks. After those two weeks, swap the toys. Allow them to do whatever they want with the toy. The tactic is supposed to help because all aggression will be met with no response, allowing the rabbit to learn that the second rabbit is not a threat. Keep swapping the toys every other week until both bunnies ignore the toy completely (or cuddle with it if you are lucky!)
Before giving them the living room or entire apartment to share, you will have to try to find a purely neutral small area first. Many people use the bath tub or a box in the bathroom as most rabbits dont go in there. If possible, you should try it too. You would start with several (5+) short (2 to 5 minutes max) bonding sessions in the bath tub/box, and over the course of a few days/weeks, as they get more used to one another, increase the time of each bonding session and start to do bonding sessions a bit less. It might take a few weeks, or it could take several months. You will have to go at the pace your rabbits set. Whenever they are aggressive, stop them, push them together facing the same way (so their sides are touching), then pet them. After petting them for a few minutes, put them back in their respective cages. If at any time you do feel either of your rabbits will severely hurt or kill your other rabbit, stop bonding and give them another months break. If they constantly look like they want to hurt one another, or actually do severely harm one another, you will not be able to bond them together