What is he calls me sister but flirts with me?

The situation you're describing is a common social and relationship dilemma where someone refers to you in a sibling-like way, using terms such as "sister" or "brother," but also exhibits flirtatious behavior towards you. This can create confusion regarding their true intentions and the nature of your relationship. Here are a few insights into navigating this situation:

1. Understand Their Intentions: It's important to clarify the intentions behind their actions. Sometimes, people use familial terms like "sister" or "brother" as a way to express closeness and affection without wanting a romantic relationship. However, mixed signals can be confusing, so understanding the context and their personal social habits is useful.

2. Communication: Open communication is key. If you feel comfortable, discuss your observations and feelings with them. Ask for clarification on the nature of your relationship to avoid misunderstandings.

3. Evaluate Your Feelings: Take some time to consider your own feelings towards them. Are you interested in a romantic relationship, or do you value the friendship as it is? Your response to their actions may be influenced by your own intentions and desires.

4. Boundaries: Clear boundaries are essential in any relationship. If their flirting makes you uncomfortable, make your boundaries known. This can help maintain a healthy and respectful friendship.

5. Behavior Consistency: Pay attention to whether their behavior is consistent over time or if it changes depending on circumstances (like being in social settings or around certain people). Inconsistent behavior can indicate uncertainty about their feelings or dependence on external factors for how they act.

6. Mutual Friends' Perspectives: Sometimes, mutual friends can provide insights, as they might have observed interactions from a different perspective. However, be cautious about gossip or assuming intentions without direct communication.

7. Friendship Dynamics: Relationships evolve, and the nature of your friendship may change over time. Keep in mind that it's normal for friendships to have phases of closer or more distant interactions.

Making sense of this scenario requires a combination of self-reflection, clear communication, and honest evaluation of the relationship dynamics.