Complex sentence: Tappu realizes that Avantika loves a part of Tappu, his avatar at the date, which doesn't exist anymore and writes her a letter telling the truth but the letter gets in the hands of Omkar before Avantika.
Split into simpler sentences: Tappu realizes that Avantika loves a part of Tappu, his avatar at the date (which doesn't exist anymore) and writes her a letter telling the truth. But the letter gets in the hands of Omkar before Avantika.