When a guy sends you close-up selfies of his face during a conversation, it could mean a few different things. One possibility is that he's trying to express his current mood or emotions. A selfie can be a quick and easy way for him to show you how he's feeling in the moment, whether he's happy, sad, or something in between.
Another possibility is that he's trying to gauge your interest or test the waters in your relationship. By sending you regular selfies, he may be trying to start a conversation or see how you respond. If the selfies are mostly just shots of his face or upper body, this could be a sign that he's trying to flirt with you or show his interest.
On the other hand, if he's sending you pictures of random things or places, it might just mean that he likes you and wants to keep the conversation going. He may simply enjoy sharing his life with you and wants to include you in his daily activities.
Of course, every person and situation is unique, so it's important to consider the context of your relationship and the specific circumstances of each selfie. If you're unsure about his motivations, it may be helpful to ask him directly and have an open and honest conversation about your feelings.