Pregnancy shock?

hi all, im faced with a unplanned pregnancy, i no 100% that a abortion is out of the question, i just dont no how to tell my bf, weve only been together just over 2 months, please dont say u shouldve used contraception, it failed me, and its happened, so i have to deal with it, sholud i tell him face to face or over the phone?? please help, many thanks