When someone tells you that they're not feeling fine, it's essential to respond with empathy and support. Here are some things you could say to show your concern and care:
"I'm really sorry to hear that you're not feeling well. Is there anything specific that's bothering you?"
"Take your time and let me know if there's anything I can do to help or if you want to talk about it."
"I'm here for you if you need someone to listen or lend a helping hand."
"Remember that it's okay not to be okay sometimes. I'm here to support you through whatever you're going through."
"If you need some space, I understand, but know that I'm here whenever you're ready to talk."
"Take care of yourself, and don't hesitate to reach out if you need anything."
"You're not alone in this; I'm here to support you through the tough times."
The most important thing is to be sincere and compassionate in your response. Letting the person know that you're there for them and willing to listen can be comforting and reassuring during difficult moments. If they seem to be going through a particularly tough time, it may be appropriate to suggest seeking professional help or talking to someone they trust for additional support.