Im sorry to hear that Sis. Mahirap talaga kapag instinct na ang umandar kasi most of the time, tama. Kagaya nga ng sabi mo, you tried opening up na sa kanya about the matter pero in denial pa din siya. What I can suggest is try talking to him again once more and this time, give him the possible consequences of his actions should he still remain to be like that. Remind him na dapat as partners, mayroo kayong constant open communication. Ask him the reason why he needed to create another fb account or that why did he suddenly put password sa phone. Tell him that you respect his privacy but also tell him your rights as his partner.
Magbasa pa