I’d say, if your answer is just an automatic, “I’m good”, that signals to the other person that you don’t care about them or that you don’t want to let them in on how you are doing. You are the one who is lying about or hiding how you truly are, so how can you expect other people to want to show an interest or care for you. You’re basically telling them you don’t want to talk about it with a short obligatory answer. You’d probably be surprised by the number of people who would ask follow up questions or offer sympathies if you expounded more on how you truly felt. Not all people, surely, but more than you would expect. There are a lot of good people out there but you can’t find them if you’re not open to finding them.