I haven't told anyone but there is someone that I want to talk to because there is something that I need to talk about that I never told anyone before and I'm gonna end up exploding but I don't know how to say it.
Okay, it seems like this issue is causing quite a bit of stress for you.
Are you worried about how they might react to what you want to tell them?
If you are, you could try and asking the question in a vague, hypothetical way, so that you can get a feel for what their reaction might be. For example, something like "What do you feel about (issue)?"
Hope this makes sense. If it's something else that's making you unsure of how to say it, let me know