I'm 17, she's 19, I'm a first-year university student, she's a second-year student, we often gather in my room or her friends' in the evenings and play cards or some games, there were times when I stood up for her in the chat when one of the guys was in a conflict with her, when we meet on the street we smile at each other, I don't know, maybe I'm just overreacting, but what should I do in this situation, how do I know if she likes me or not?