MY BOYFRIEND ACTS TOO PERFECT.......................…

i have known him since we were in 3rd grade now am 21 and we liked each other since 4th grade..we been togther for a year now..we love each other...my bf has neva messed up he always say the right thing...is too perfect and i have never had that in a realationship...he told me yesterday he will neva break up with me even if he caught me cheatin that he loves me too much......i don't kno if i should be glad or sad is too pefect...he is such a pretty boy also and too nice i really need help!!! if is a problem