I have a non-sexual boyfriend too. I totally understand where you are coming from. We are bonded in ways that are beyond friendship. We both have busy relationship lives that fulfill us and we don't need to have sex, although he would very much like to
We both know that our status would change if we did and both don't want to jeopardize what we have now. Why clutter a perfectly good relationship with sex. I think if he had more going on in that department elsewhere then it would be to our benefit. Working on that.
The woman you are friends with would have a vee relationship if she is a hinge... rather than a triad. Just so you know. Especially if her men are not friends. A triad is a group of three that are all in love. Just to let you know the traditional definitions anyway.
Ya, a chat about how you feel now might be a good idea. You might find that you will have some support for your situation and have the chance to now be supportive towards her situation also