Be careful with how you express your feelings.

Choose the right time to make jokes.
Use your sense of humor to connect with others.

Recognize the difference between bittersweetness and nostalgic feelings.
Try to maintain these feelings under control as they can trigger negative experiences, especially if you are prone to develop depressive states of mind.

Be careful when using irony or sarcasm.
What’s your purpose for being ironic or sarcastic? Do you think it’s better to conceal the truth rather than be honest about it?