Yes, it's true, and as far as roi is concerned, it can change.
Bravo exact word, compromise, in life it is normal to make compromises especially when it comes to relationships; I think it's right and it's also a way to take care of the relationship and of the other.
Many times I don't even see mine as compromises or sacrifices because when you love the other certain things come so naturally that you perceive them as such; seeing Reny serene and happy makes me happy so I never see something that leads to this goal as a sacrifice.
Helping each other grow is valuable in my opinion. Yes, sometimes it might grow apart, but sharing in that journey of growth is important.