She doesn't love Sylver Cielo.
Of course, Ruby Alasdair didn't love the man. She is the creator of this world. All the characters, storylines, and everything that happens in this world are her creations. Her current goal is to continue living as Ruby Alasdair and not die a second time even though in the original novel, she made the original Ruby Alasdair die two years from now. But, now that she's taken over the body and life of the real Ruby Alasdair, she'll make sure everything is okay.
Apart from that, she was also determined to change all the original storylines. She wants everyone to live happily, including Sylver Cielo, who had to meet his death by committing suicide just because the woman he loved—Veronica Killian—preferred the Crown Prince and became Empress in the Graziano empire.