What is signs he regrets rejecting you?

As an AI language model, I do not have access to a specific individual's thoughts or feelings. However, some signs he may regret rejecting you could include:

1. He reaches out to you frequently: If he suddenly starts texting or calling you more often than before, it could indicate that he's feeling regretful about his decision.

2. He appears jealous: If he sees you with other guys and seems visibly upset or even angry, it could be a sign that he regrets rejecting you.

3. He apologizes: If he brings up the rejection and apologizes for his behavior or decision, it could indicate that he's been regretting it.

4. He tries to impress you: If he suddenly starts dressing better, working out more, or otherwise trying to impress you, it could be a sign that he's trying to make up for rejecting you.

5. He asks about your dating life: If he's curious about whether you're seeing anyone else, it could be a sign that he's regretting not being with you himself.