Break up.
I'm at the almost 6 year point with live in boyfriend. We view it as a marriage.
We deep talk all the time. Just last night we talked about where we are going to live when the kids go off to college - we want to live one year internationally just to shake it up, bucket list type stuff.
The night before that we had porn star sex, thats what I call it. Its full lights, his fav position. Before that we ate crap and watched stepbrothers.
What I am trying to say is that we are so compatible and the chemistry is so good that at 6 years its like the honeymoon phase but solid.
However even in the shitty abusive marriage I had befoe this, we were still having life talks etc so...
I think your boyfriend is one of those types that is boring and he's settled and that good enough.