it is not typical for someone to have both a boyfriend/girlfriend and a spouse at the same time. In most societies and cultures, marriage implies a monogamous commitment between two people. Engaging in romantic relationships or cohabiting with someone else while married is generally considered ethically and socially unacceptable.
If you are referring to a situation where your boyfriend is legally married to someone else and also involved in a romantic relationship with you, this may be considered polygamy or an extramarital affair. Such situations can be emotionally complicated and can lead to significant ethical, emotional, and legal issues.
If your boyfriend is legally separated or divorced from his spouse, then it may be more understandable for him to have a romantic relationship with you. However, it's essential to communicate openly and honestly about the situation to ensure that all parties involved are aware and consenting to the arrangement.
Ultimately, what is considered "normal" in relationships can vary based on cultural norms, personal beliefs, and individual circumstances. However, it is crucial to have open and honest communication with your partner and ensure that everyone involved is aware of and comfortable with the arrangement. If you feel uncomfortable or unsure about the situation, it's essential to discuss your feelings with your boyfriend and consider seeking guidance from a relationship counselor or therapist.