Mark and rosa commit to support each other, but they have no real physical passion and do not share their thoughts and feelings. their love is called

In this case, their love is called  Empty.

Empty love refers to the type of love which has lost all of the passions but yet the commitment still remains.
Couples often trapped in this type of love because they have somehow grew apart throughout the years but they still decided to stay for the sake of convenience (such as money, kids, etc)