Only because, she always seems to look out for him and always cares about him so much. And maybe he cares about Gunjan so much, not only because she is special to him, but the fact he doesn't actually have a parental figure present in his life at the moment, he looks up to Gunjan for advice and help in his problems! Gunjan also seems to act like a mother figure as well. She always looks out for him and always sacrifices her own happiness for his, which is what a mother always does for her kids. she always corrects his wrongs and turns them into rights. I kind of think that she is like a mother figure.