That's really sweet of you! Here’s a heartfelt message you could send her:
Hey love,
I just wanted to take a moment to let you know how much I care about you. I’m so sorry you’re feeling under the weather right now. Remember to take it easy and give yourself the rest you need. You’re the strongest person I know, and I have no doubt you’ll be back to your bright, beautiful self soon.
If you need anything—whether it’s some soup, a movie, or just someone to snuggle with—I'm here for you. Sending you all my love and a big virtual hug! 💖
Take care of yourself, and I can't wait to see you back to your amazing self!
Love you lots, [Your Name]
Feel free to customize it to make it even more personal!