Seems that it's common for couples that broke up to still live under the same roof. Some even sleep on the same bed. This will obviously be a problem, when one of them become attached. The new bf will undoubtedly find it difficult to accept the arrangement.
The new bf will not be able to understand why the ex still stays there even though he is being reassured that nothing is happening between them. The fact that his current bf has separated with his ex, doesn't mean they no don't care for each other, but quite the contrary, he care for him like a family member. He is privy to his financial status, the traffic that he has to beat through daily, and how sharing the same roof still can reduce his burden while finding his own path again in singlehood. This I guess is the virtue of gay infidels.