Solaris - I am talking about the remake with Clooney. The premise is that he is on a spaceship, deep in space, that comes in contact with a godlike alien. The alien takes over the ship by letting people live whatever life they wanted. Clooney had a wife who had an abortion without telling him. When she told him, he left her and she committed suicide. The alien remakes his wife and he has the option of living a fantasy life with his alien wife to try to redo everything or to reject it and go home. It is a movie about regret more than space.
Sunshine on the Spotless Mind - This movie is paced odd in part but I think it gets right the feelings fun and exploration when you find someone new and how things sometimes slowly decay if no one pay attention to the relationship.
The Counselor - the final scene when the Counselor wants to get his wife back and the old man tries tell him that he can never go back to how things were and he is where he is now due to chooses made a long time ago and all there is only acceptance.