i always call him(my bf) jaan because he is my jaan(life)but one day i was in kidy mood & i called him jannu .he love this name & me 2. he call me "mitho"

wat does mithu mean?

I love using Janu!

Afghans use that too : )

I think you're an indian/Pakistani :)
cause this language in which JAAN word is there is HINDI/URDU and sindhi. :))
I think you're one of them :) and I am too :D