Complex sentence: A few years later Anu is happily engaged to Arpit Oberoi (played by Priyanshu Chatterjee); then Arpit leaves for America for business reasons and Anu is haunted by a man named Aman (played by John Abraham).
Split into simpler sentences: A few years later Anu is engaged to Arpit Oberoi (played by Priyanshu Chatterjee) and all is well. Then Arpit leaves for America for business reasons and Anu is haunted by man named Aman (played by John Abraham).