"I'm just going with the flow" ...what does it mean a guy says this?

Anonymous
My boyfriend and I have been dating for a year.

Yesterday he said he is "just going with the flow" of the relationship.

Does this mean he's not thinking of taking it a step further? Or does it mean that he is only with me because he can't get anything better?

Or what?
"I'm just going with the flow" ...what does it mean a guy says this?
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