There is a word for it but its not as "kind" as oversharing. Im speaking about what the other person is probably thinking. I have the same problem. I think I do it to try and get a conversation going. Most of the people I know basically NEVER share at all , especially their "true" feelings or take on most subjects.
I starve for a real conversation since my real life friends and family are not many. I wish many times that I could be like them and not talk about anything,
( at least anything real ). I'm actually practicing how to just shut up.
I AM a good listener ( believe it or not ! ). Im assuming "oversharing" in the personal sense ? Like blurting out too much private information ? Sometimes being too honest with the wrong person can get you into a jam ! Trust is a hard thing to determine. Anyhow......see ! I think I just overshared