why did I fall in love with you my heart will not survive anymore

This story is about a girl called Nikola she is 17 years old and lives in Europe but decided to go and visit her friend Bonnie .
Bonnie is a witch and Nikola is a Vampire/Human .
Bonnie shows Nikola her place and decided to go to her friends Damon, Stefan, Caroline and Elena.
Ellen and Nikola start to hate each other .
Nikola falls in love with Damon.
She then sees one day when she comes back home that Damon and Elena are kissing she turns mad and turns of her humanity she then starts to kill people.....
Kathrine and Nikola are friends and both hate Elena so they try to make a plan to kill her.

Will Elena and Nikola be friends ?
what will happen to Nikola ?
will they kill Elena ?

All of the characters are from The Vampire Dairy but Nikola isn't in The Vampire Dairy i think i don't now.

Have a nice day or afternoon .