What is he told me he has a girlfriend?

As an AI language model, I do not have any specific information about who told you they have a girlfriend. However, I can provide some general information about such a statement.

If someone tells you they have a girlfriend, it typically means that they are in a committed romantic relationship with someone else. They may have shared this information with you in order to clarify a boundary in your own relationship with them, or simply wanted to be honest and upfront about their relationship status. It is important to respect their relationship and any boundaries that may come with it.