Open Sacral Chakra . Wear Moonstone and Aventurine.
But to be an empath as for any abillity You need mental predispositions , specific profile. Anyone has talent for some ablities , some for PSI group , some for ESP , but to some we are just not inclined sa they can be contrary to our nature or to who we are. Emathy is actually one of the rarest gifts out there , just because it is hard to handle and dangerous in wrong hands ( empathic manipulation ).
Anyway go to Scribd , type "Spiritual empathy" , there is a document that explains how to know are You an empath, how to induce emmpathy , preform cleaning for empeaths, mediatations and chakra opening and much more.