I think they guy is worried about a love-tied relationship causing harm to the relationship they already have (friendship or otherwise) and any other relationships they have with others.
But she's saying that they should ignore the reasons why they can't be together.
It could be that they are cheating on others it could be that they previously said they can't be together for whatever reason.. whatever situation.. I say that is what it is.
I think they guy is worried about a love-tied relationship causing harm to the relationship they already have (friendship or otherwise) and any other relationships they have with others. But she's saying that they should ignore the reasons why they can't be together.
It could be that they are cheating on others it could be that they previously said they can't be together for whatever reason.. whatever situation.. I say that is what it is.