Really?Why does he tell you that?Maybe he want you to give him or share.But it depends on you,it is your bitcoin not your friend.If you want to sell it then sell it if not then tell your friend i will hold my bitcoin until bitcoin will rise.Don't make things complicated.
I guess from January 17 until now the OP has learnt a great lesson whether he sold or not because bitcoin has gradually risen back to quite a good value now and so i don't think if he had sold then it would have been a sound advice. Hope he didn't sell though.