Liara is 1 of 2 options available to Commander Shepard during Mass Effect. The other is Kaiden for Female Shepard or Ashley for Male Shepard. Here’s how romance the Asari.
Liara is quite easy to romance. Once saved all you have to do is speak to her behind the medical clinic. The clinic is located on the second floor on the right side of the ship. In the back room is Liara.
Talk to her in a kind and joking way to increase romance points. Eventually Liara is start to open up and flirt with Shepard. If you also romance Ashley this will trigger a confrontation during the end of Act 2. If done correctly Liara will comfort Shepard after being grounded by the Council. Deciding to sleep together before heading to Ilos.