Ever since Armaan has known the meaning of love, it has always been Ridhimma for him. Ridhimma became his life and her happiness was all that mattered to him. Now without Ridhimma, his life has no aim, and thats why we see him doing the things he's doing in DMG. It's not his fault, because as he had said to Ridhimma, Armaan does not know how to live without Ridhimma.
TANHA THI RAATEIN
KUCH NA BADALTA
JO TUM NA AATE
KEHNE KO YUN TO RISHTEE KAYE HAI
RISHTOON MAIN KOIYE APNA NAHI
MERA JEENA HAI KYA
MARNA HAI KYA
JAB SAATH TERA NAHI
PAA KE RABB KYA KARU
JAB TU HI MERA NAHI
MARNA HAI KYA
JAB SAATH TERA NAHI
PAA KE RABB KYA KARU
JAB TU HI MERA NAHI