Most Helpful Guy
you don't need to turning your phone off, show the courage that you have an independent life, thoughts, feelings. don't answer him or block his number and everything will be ok.
Most Helpful Girl
... Turning my phone off and ignore him than pretend everything is ok and wish him a happy birthday.
Put him on your own Pay no mind Long Lost list and bid him farewell from the comfort of your own living room.
Good luck and enjoy your weekend. xxoo0