Does my friend really believes she is happy?

Happiness works in different ways for different people, no matter the negative problems in their lives. For instance, she probably doesn’t like that her boyfriend is abusive and cheating, and she may use drugs to escape the stress, but she could still feel happy during different time periods when she’s in a good mood. Sometimes, when people are occupied and not paying attention to the negativity in life, they could feel ‘happy’ at the moment because they aren’t focusing on what stresses them. Nonetheless, to answer effectively, you didn’t provide enough information regarding exactly how your friend feels about the abuse, cheating, substance abuse, and how she’s doing financially. Does she constantly complain about her problems? What is her typical behavior? How would you describe her personality? Plus, you didn’t provide enough information to explain what you could be ‘jealous’ of.