How to tell if she actually likes me or is just being polite to her parents?

You are dealing with the classic ambiguity of early arranged meetings where parental approval moves faster than personal rapport. Smiling and answering questions is standard courtesy in these settings, but the complete lack of reciprocal curiosity points directly to someone who is performing politeness rather than exploring a match. When a person asks you nothing about your life, your values, or your goals across two separate meetings, they are signaling disinterest masked as good manners. Her father calling to proceed means her family is satisfied, but it tells you nothing about her internal state, and she may well be reluctant to voice any hesitation directly to her parents. You need to create a low-stakes opening for her to speak freely, outside the presence of both sets of parents and away from formal hotel lounges. Call her directly and say you noticed she was quiet during your tea meetings, and ask if she feels pressured to move forward with this match by her family. Acknowledge that speaking honestly carries a real cost for her, because admitting disinterest to you might feel like creating a household conflict she wants to avoid. By giving her explicit permission to say no without fear of you carrying tales back to the elders, you shift the dynamic from an interrogation to a real conversation. If she still offers only monosyllabic agreement, take that silence as your answer and step back before the families lock the arrangement in place.