Here is my passage. I believe I'm doing it right, but I'm not sure why.
Does this have a specific name? It doesn't seem like an interjection to me, so I'm not sure why I'm so comfortable using a comma rather than a semicolon.
"Do you come here often?"
"I guess I like the ambience, I don't know."
There are some other examples besides "I don't know", but I'm blanking on them right now.
Edit: I thought of a couple more examples that are a little less obvious of a comma splice
"Truth is, I really don't like Cheetos all that much." I used to use a colon for "Truth is ..." but now I use a comma.
"I know why you know why I know that, you know." I have always used a comma for "you know" as an independent clause.