Could you tell me some alternatives that could replace "cheer up"?

Native speaker’s answer
Rebecca
Some similar expressions of encouragement are "chin up," "hang in there," or "things will get better." If you want to express a more heartfelt encouragement, you can use expressions like "I'm here for you" or "you can count on me." Ex: Chin up, dear! I promise things will get better. Ex: Hang in there, things will get better once you get used to your new job.