If it was me, the very 1st thing that I would do is sit down, close my eyes, a few very deep breaths and think. As far as" do I see myself with this person for the long haul? Waking up and seeing this person across the breakfast table and taking a walk at night hand in hand? If one would say yes, then, in my opinion, I would have a coffee, tea or soda, NO alcohol, weed or street drugs at this juncture with the person and bring it up. A lasting AND loving relationship is all about trust, honesty, and being best friends. Not being risqué' at all, but does this person make one feel alive and wonderful? Then an open, loving and honest talk would be in order.
Case in point, I found out when the bank called me and told me that the checking account was almost wiped clean. Would the marriage be saved? Maybe /maybe not, but not tell one's life partner nothing and trying to keep them in the shadows, NEVER EVER works, long time down the road, and I feel too many people do not think long term, just in the moment.
Also, just because one is on here, there in again, does NOT mean that a person is 100% looking at ctb or the like. Like me, I find this site so supportive and like family to/for me, read supportive. Now the other person should not take offense, as far as "hey am I not being supportive enough to/for you?" kind of a question. The other person more than likely is doing a great service. help, BUT there is nothing like being, talking, thinking and reacting to folks who have some of the same issues that the person has.
When I applied to this site, I was 100% honest in so far as with 2 attempts I wanted to be around folks who could understand my plight and I could do the same for them. I NEVER said anything about ctb.
Just relax, talk it over/through and one might find out that there has been an unspoken understanding all along.
Walter