First of all, are they willing to include other people in their relationship? If they've said so directly, it's mostly a matter of hoping everyone's tastes and interests match! If they've rejected the idea explicitely, you must never EVER tell them how you feel, or else things will be awkward.
If you don't know, you'll have to investigate before we go back to the first two scenarios.
no subject
First of all, are they willing to include other people in their relationship? If they've said so directly, it's mostly a matter of hoping everyone's tastes and interests match! If they've rejected the idea explicitely, you must never EVER tell them how you feel, or else things will be awkward.
If you don't know, you'll have to investigate before we go back to the first two scenarios.