aap mujhay abhi

Agar aap mat chaana mujhay taraf kahna taraf aap batana mujhay abhi , khush karna kehna shab-bakhayr aor mayn hun razamand taraf rokna yeh baat cheet abhi.

It looks as if you are trying to translate word by word. If  you want to say:

"If you don't want to talk to me then you should tell me now. I will be happy to say good night and I will agree to stop this conversation now", then its translation in Roman Urdu will be: 

Agar aap mujh se baat nahin karna chahte to mujhe abhi bataen. Meyn aap ko khushi se shb bakhayr kahoon gi aur is baat cheet ko abhi rok doon gi.