What is she gets jealous but has a boyfriend?

As an AI language model, I have no information about an individual person getting jealous while in a relationship. However, it is common for people to experience jealousy even when they are in a committed relationship. This could be due to several reasons, such as their partner's behavior, interactions with other people, or unmet emotional needs. Some people may express their jealousy and insecurity in an unhealthy and possessive manner, which can lead to conflicts and relationship issues. It is crucial for both partners to communicate openly and honestly about their feelings and establish healthy boundaries to maintain a healthy and fulfilling relationship.