Original sentence: Carrie teases him that now they have slept together, they will also have to get married, but it is clear that she too sees their liaison as a one off.He later confesses to her that he loves her, and if her wedding is unsuccessful, he would like to have a relationship with her, an offer she politely declines
Edited sentence: Carrie teases him that now they have slept together, they will also have to get married, and she is probably serious, unlikely as it seems.He later tries to confess his love to her and hints that if her marriage is unsuccessful, he would like to have a relationship with her.However, he says it rather lamely, and the confession obviously comes too late.Then she goes back home to America