I feel like getting something off my chest.
Why do you feel like doing that?
I feel like getting something off my chest, like I need to say it for my own good.
Talking to someone about something that's bothering you is the first step to understanding it and resolving the pain within you. Getting the perspective from an outside party will help you move on from the trouble.
I'm feeling good now. Thanks.
Being honest will make you feel a lot better and make you happier. You are doing the right thing.