At this point if they were not nest mates/siblings and raised together you cannot house them together, at least not yet. You will need two cages and they will need to get to know each other through the bars. Eventually you can let them out and supervise a play date and see how they do with each other. The thing is........Lovebirds are very picky about their mates and friends, they might not get along, in which case you will always have to watch them when they are both out or they would need to each be out separately. But on a more positive note.......they may get along just fine, but you will have to take the time and the precautions until you know for sure how it is going to play out. I recommend getting a DNA test anyway........that way you know for sure what your dealing with. Two boys will often get along just fine. Two females are not as easy..........two females will often not get along, but I have heard of two females totally playing house together and making nests. So it just depends.......good luck with whatever you decide. Don't forget to quarantine any new bird you bring home, even from the same breeder.