This page contains all the information you need on how to begin, and keep, a romance with Garrus Vakarian.
Reunite with Garrus
Garrus is one of the romances you can do as a Female Shepard. If he survived the suicide mission, then you’ll join forces again during the mission Priority: Palaven. However, you’ll only be able to continue the romance with Garrus in Mass Effect 3 if you were in an active relationship at the end of Mass Effect 2.
Once Garrus is back aboard the Normandy, speak with him and then you’ll have the opportunity to continue the romance by saying “I’m still interested” followed by “It won’t be easy”. After this conversation has come to a close. meet with Garrus on the Citadel for a little catch up.
Continue progressing the story, then once you’ve completed Priority: Citadel II, meet with Garrus on the Citadel again and say “Like alcohol?” followed by “Yes, I love you”. This will secure your relationship with Garrus and will prevent you from doing romances with anyone else on the team.