First of all don’t panic…He went nine and a half years so this could just be a blip…Is he easy to talk to openly? if so very gently ask him to be honest …Is this just a stressful blow out or does he feel that he could be going down the same path as before…In his heart he will know..If he gets stroppy or self protective leave it until another time when he is calmer…If he will talk don’t be resentful or judging..If he thinks there could be a problem get him some help asap…nip it in the bud quickly….Be supportive…hes got through this before…You never said if there were any risks to you so I’m assuming there is nt…If there is you will need to be a lot stronger and take yourself away from the situation xx