"Ik hoop dat je je beter voelt."
This directly translates to "I hope that you feel better."
Here's why it works:
* "Ik hoop" means "I hope"
* "dat" is the conjunction "that"
* "je" means "you"
* "je voelt" means "you feel"
* "beter" means "better"
You can also use a slightly more informal version:
"Ik hoop dat het beter met je gaat."
This translates to "I hope that it's going better with you."
Both options are commonly used and convey the same sentiment.