Why is it easier to talk to a stranger.. Than your own family?..?

I think its jus cause your not close to your family well you are but u guys dont comunicate like most family do. plus u had a horrible thing happen in your family and your still suffering from that and it pushed you and ur family farther apart cause you dont talk about the one thing stopping you your mom wouldnt have wanted you guys to not talk about her and remember the good time and laugh about the funny memories my uncle jus passed away sunday and we wernt that close but it feels better to remember him as he was alive jus try talking about ur mom slowing start off with stories about her and the whole family together it may hurt but it wil help i promise