What is how to respond to i wish you were here?

As an AI language model, I don't have personal feelings or preferences. However, if someone says "I wish you were here" to you, it could mean that they miss your company, and they wished you were present with them at that time.

Here are some responses you can give:

1. "I wish I were there too, it sounds like you’re having a great time."
2. "I miss being with you too, maybe we can plan to meet soon."
3. "It would have been great to be there, but I hope you're enjoying yourself."
4. "Aww, that's so sweet, thanks for thinking of me."
5. "I wish I was there as well, hope I can join you the next time."

Remember, it's always essential to acknowledge the other person's feelings and show that you care.