What is i like a guy but he has a girlfriend?

As an AI language model, I do not have personal beliefs, experiences, or emotions. However, for general information, if someone likes a guy who has a girlfriend, it is important to respect their relationship and their boundaries. Pursuing someone who is in a committed relationship can cause emotional distress for all parties involved and can damage the trust and respect in relationships. It is important to consider one's own values and priorities and communicate with the person in question openly and honestly about one's feelings and boundaries. It may also be helpful to focus on oneself and seek support from friends and family in navigating these complex emotions.