If your pet could pick one human hobby to join you in, what would it be and why?

So I told a ex that we should be honest if our feelings ever changed so we don't waste each other's time but ended up stringing him along for 5 months pretending I still loved him and then ghosted him to move on from him, am I horrible?
What are the insecurities and vulnerabilities that we ENTPs don't want to share with anyone (or share but with reservations and always on the defensive)?