This page contains all the information you need on how to have a romance with Liara T’Soni.
Liara is a romance option for both Male and Female Shepard in Mass Effect 3. However, you’ll need to make sure currently not any active romance before you can go on to start or continue one with Liara. To begin, complete the mission Priority: Mars to find Liara. Once the mission is complete, speak with her aboard the Normandy and she’ll ask “Are you still interested in us” and you’ll want to respond with “I’m interested in you” to continue you romance off from the previous games.
Continue catching up with Liara after each mission and respond with Paragon Responses (top right). Eventually you’ll see a message from Liara on your Terminal and you’ll want to invite her up to your cabin and she’ll give you some information on her current project. Here she’ll want your opinion on your entry and you’ll want to respond with “I’d like you to decide”.
Upon completing Priority: Citadel II, you’ll receive a message from Liara on your Terminal asking you to meet the Presidium Commons which can be found at the Citadel. As your conversation with her comes to a close, she’ll say “I wish we could spend more time together like this. Just… friends.” and you’ll want to respond with “I want more than just friends’’.