<human>: Can you succinctly summarize the text in 1-3 sentences?

I have dated Sam [31M] off and on for the past five months. He is the person who's closest to me and helps me deal with some medical issues. We typically act like a couple but don't consider ourselves to be in a relationship.

I found Scott [24M] on a dating site and had lunch with him today. Lunch went really well but I haven't told him about the medical issues or Sam yet. I have not told Sam about Scott as anything beyond a friend.

How long do I have to decide if I see anything going anywhere with Scott before telling Sam about him (or him about Sam)?
<bot>: I'm still close with my ex, but think things might go somewhere with a new guy. When do I tell each about the other?