Yes, it can be considered possessive if a husband does not allow his wife to go on a girl's trip. In a healthy relationship, both partners should have the freedom to make individual choices and have their own social lives outside of the marriage. Trust and respect are essential elements of a strong relationship, and both partners should be able to trust each other to make responsible decisions.
If one partner tries to control or restrict the other's actions and activities, it can be a sign of possessiveness or even insecurity. It's essential for both partners to communicate openly, set boundaries, and discuss any concerns they may have about each other's activities.
In a respectful and trusting relationship, the husband and wife should be supportive of each other's need for personal time and space, including trips with friends. Of course, there may be circumstances where a husband or wife might feel uncomfortable or worried about a particular trip, and in such cases, open communication and understanding are vital. But outright refusal without valid reasons can indicate possessive behavior, which can be harmful to the relationship in the long run.