I am not big on sticking a label from the DSM on a condition or behavior. We’re all crazy, just at different points on the different spectrums and all in our own unique one of a kind snowflake way.
What I think is most important with any behavior that is negatively impacting your life (and it sounds like this one is), is that you work either alone or with a professional on behavior modification. The first step to change is awareness of the problem, so congratulations! You’re already on the way. The next step is to “catch yourself in the act,” See if you can become more aware of the behavior as it is happening – or immediately after. Don’t chastise yourself, just notice. Then see if you can’t find yourself on the verge of saying something that is not appropriate – and substitute it with something more appropriate and more calm. You can still be bubbly and show enthusiasm and interest in others without blurting out something that will make people uncomfortable. Notice the reactions you get. Sit with the experience a bit…no need to rush on, do anything else, make anything happen.
If you find after a while of trying to modify your behavior on your own, that you are unsuccessful, recruit a therapist to give you more tools and techniques.
As to your question “what is it with me?” I’d say it’s just that you are a nice friendly person who has learned an unfortunate habit of interacting in a manner that no longer serves you. Now you can begin to unlearn it. I have a feeling you’ll do just fine – as awareness is the most key component of any change, and you have it.