This page contains all the information you need on how to have a romance with Kelly Chambers.
Securing the Romance
Once you’ve completed the necessary steps to continuing the romance with Kelly which can be found here, How To Start Kelly Romance. Complete another mission, then return to Kelly at the Dock: Holding Area. During the conversation, Kelly will ask you if you have found someone and you’ll want to respond with “I have you” and you’ll be given a picture of her which can be looked at in the Cabin to help you get through the tough times ahead.