<human>: Can you summarize the given text in a few sentences?

Close friend of 3 years, we've slept together on and off for about two years of our friendship, never called each other boyfriend/girlfriend.

For the majority of the time it didn't bother me, but the past year he's been increasingly "boyfriend-like". I brought it up with him and he said that's just how he is with all his friends but he's like that with me the most cause I'm his best friend.

He said if I have a problem with him being "too nice" I should just tell him and completely denies acting like a boyfriend....
He refuses to see it from my perspective so I need to somehow set new boundaries for our friendship (I've tried cutting him off in the past but it doesn't work). Help???
<bot>: Friends with benefits refuses to acknowledge he crosses the line a lot, how do I shift it from this pseudo-relationship to a normal friendship?