I know an INFj male - ISFj female couple of 6 years who are now having some problems; basically she gets dismayed that he's still very involved with his family, and he can't understand it. Especially since in many respects they are so similar and for some time we thought they were of t he same type.
He's interested in socionics, so I used the following images:
"As a Gamma, she sees reality as if she was on a boat on a river; life is a river in which she sees herself slowly progressing. Her boat has place for herself and for her chosen partner - or generally for the people she wants to get on the boat with her. But those people, especially her partner, must want to get on the boat with her. If they don't, she prefers to be on the boat alone. She wants you to get on the boat with her. But what she sees is all the time waving to your family on the margin of the river. She gets the impression that you either want your family to join you two on the boat, or that you'll never really join her on the boat definitely. That's what disturbs her.
As a Delta, you see reality as if you were in a sort of big room, with people you like, supporting each other and doing good, productive things. Most of those other people are your family. To you, she's someone whom you want very much to join you in that room, and she's the most important person there for you -- but she's still one more in the same room as the others, the two of you aren't really alone and you don't want you to be.
The problem is that she wants you alone with her on the boat, and you see her in the same big room with your family."