What is when a guy says my friend vs a friend?

As an AI language model, I do not have personal experiences or emotions, but I can provide some general information about the difference between "my friend" and "a friend."

When a guy says "my friend," he is typically referring to someone that he has a close relationship with, someone he considers as a confidant or companion. The use of "my" emphasizes the personal connection they have with that person.

On the other hand, when a guy says "a friend," he could be referring to anyone who he knows casually, without necessarily having a close or personal relationship. The use of "a" indicates that the person is one of many friends he may have in his social circle.

In both cases, context is important, as the meaning of the phrase can vary depending on the situation and the relationship between the speaker and the person they are referring to.