I would just be careful of yourself. If this “arrangement” ends, it will be so painful.
Saying that, I too have wanted this with my TF. Only because I can’t have anything with him right now as his energy and life stuff is too heavy to entertain anything more. Then again, he started out thinking this would be how we were, but before anything happened between us, he ran! Either he wasn’t ready or, as I suspect, that’s when his feelings got too overwhelming. Just wish there was more “knowing” in this journey rather than feeling and intuition x