You're on a crashing plane and your partner is fast asleep. Would you wake her/him up to say 'I love you' one last time or let her/him die in her/his sleep?
I would let him sleep because I would want him to have those last few moments of peace. I am a firm believer in telling my loved ones that I love them on a regular basis, so he would know how I feel. I would just grip his hand and pray.