What is why does she get jealous if we are just friends?

It's impossible to definitively say why someone gets jealous if you're "just friends" without knowing the specific person and situation. However, here are some potential reasons, framed as relevant concepts:

• Unrequited Feelings: She might have romantic feelings for you that you don't reciprocate. Seeing you with other people, even platonically, could trigger jealousy because it highlights that her feelings aren't being returned.

• Low Self-Esteem: If she struggles with her self-worth, she might feel threatened by other people in your life. She might worry that she's not "good enough" to keep your attention, even as a friend.

• Insecurity: Linked to low self-esteem, insecurity can manifest as a fear of abandonment or replacement. She might worry that you'll find someone else "better" to be friends with and leave her behind.

• Past Experiences: Previous betrayals in friendships or relationships can lead to trust issues and increased jealousy in subsequent connections. She might be projecting past hurts onto the current situation.

• Misinterpretation of Signals: She might have misinterpreted your actions or words as signs of romantic interest, leading her to believe there's something "more" between you than just friendship.

• Possessiveness: This is a less healthy dynamic. She might view you as "hers" in some way, even without romantic involvement, and feel entitled to your attention and time.

• Fear of Missing Out (FOMO): If you're doing fun activities with other friends, she might feel left out and jealous of the experiences she's missing. This is more about the activity itself than the person you're with.