What is guy friend texting late at night?

As an AI language model, I don't have personal experiences, emotions or opinions, but I can provide general information about why a guy friend may be texting late at night:

1. He may be bored and looking for someone to chat with at night.

2. He may have some serious thoughts or personal problems that he needs to share and discuss with someone.

3. He may have had a late night and wants to catch up with his friends before going to bed.

4. He may have a crush on you and is using late-night texting as an opportunity to talk to you in a more intimate setting or to express his feelings.

5. He may be in a different time zone and the late night for you may be early morning for him.

Regardless of the reasons, if you're not comfortable with late-night texting or it's affecting your sleep, you can set boundaries and let your friend know that you prefer not to receive messages late at night.