Struggling with "Sacred"

So me and my partner have been together for over a year and a half now. We see a couple's counselor who is poly amd kink friendly, have great communication.

One of the things I am struggling with is having something that is "ours."

We nest together half the week, and share a lot of hobbies in common, but none of them are "Ours."

The only things that are unique to us are D/s related. Don't get me wrong, I love that, but it feels weird that the only things unique to our relationship are sex related.

When I have brought this up for a couple months, I would bounce ideas around and each time I was told "Well, what if I want to do that with someone else?"

Ideas were Camping, going to live concerts, sleeping over, traveling the country, and others.

We don't really have places to eat that we think of as our other than the pub we had our first date in.

Any ideas? This is really getting me down cause I don't feel like we have anything that is ours and sacred to us.