Hi there ... my sister has dementure, and she's getting more confused ... we just go into her world and love whatever place she finds her self in on different days ... sometimes she has good days and they are so lovely but she is getting days where she is really confused , so we just go along with it and walk this confusing journey she finds herself on, holding her hand and it makes it so much easier... 

So all I can say is, try to walk his path with him ... and if you feel comfortable with him, he will feel less scared ... even if you just sit holding his hand ... they are still in there, just their memories are changing ..

Take every day as a gift, as hard as it is for however long or short it is .....we are all on this journey together, me her daughter and grandkids, we're all holding on for each other ... he must feel very confused and maybe scared to ... they held our hands when we were small .. before we could talk, walk or feed our self's... the roll has just reversed ... so sending you caring thoughts, and a big hug to you and your dad ... take care of your self and know it's not any easy path but one you'll be glad you did ... chrisie  xx