The “communication rules” taught in school for a grade vs copywriting and effective communication in the real world are two different things. Music is a perfect example.
The use of the word “I” can show personal responsibility and yes, it can also come across as “selfish”. Context and history is everything.
When it comes to your feelings – there are no rules other than just share them with someone ; ]
What makes you human, unique and desirable, is emotions – not regurgitating someone else’s expectations, opinions or perspective.
I – hope that helps.