You can reply as follows: 1. Thank you for your kindness, I appreciate it.

However, I hope we can prepare dinner together so that we can enjoy the food together and socialize with each other.

2. You are such a considerate person, thank you for your concern.

However, I think we could try a new restaurant together so we can experience new flavors and atmosphere together.

3. Thank you for your generosity, but I’m not very hungry right now.

We could save this treat and enjoy it together when I'm really hungry, which would make more sense.

4. Thank you very much for your concern and dedication.

While I would love to try the food you send me, I wish we could cook together so we can get to know each other better and grow together.