what should i do?

i love someone so much...bt i dont know he truely loves me or not...coz sometimes he behaves like a stranger...sometimes he said, he loves me a lottt...its a 2nd year of our relation...suddenly i realize that my love is cheating with me...i seacrhed it carefully....at the last time i saw thats true..he had a another relation with other girl....then i broked up...after some month later..my bf is back...he said me sorry...he apolozise for all thing...he want me his life now.... i still love him truely....bt i'm confused...what can do now...plz suggest me...plz