This is not one of those "I speak as I find" type statements. Which are usually an excuse to be horrible

I can be blunt and say what is in my head, sometimes before I've given it a lot of thought. I really don't mean it maliciously, I just need to say it because I need to be honest and straightforward.
I'm not an unkind or brash person and I do know how to be diplomatic, but also I'm not able to let people talk crap or be creepy to me without telling them how it makes me feel...