Tyler defers from college much to Caroline's sadness. They have a brief reunion, but Tyler reveals that he plans to kill Klaus, thus leaving town again.
She warns him that it will be over between them if he leaves, but he does so anyway.
Tyler leaves town to break the sire bond and, when he returns having been successful, is unhappy to learn that Klaus has fallen in love with Caroline.
After Klaus's "death," Caroline tearfully kisses Tyler goodbye, unaware that Klaus has in fact, taken over Tyler's body. When Klaus bites Caroline, Tyler carries Caroline's body to where Klaus is, saying that he deserves to watch her die.
Shocked, she slams the door in his face and later explains about her existing feelings for Matt.
When Jules arrives, she informs Tyler that Caroline lied about being the only vampire and that she knows what happened to his uncle, Mason.
He pushes Sarah backwards and she hits her head against a desk.When the other side collapses and Tyler comes back, him and Caroline share a brief hug.They are referred to as "Forwood" or "Tyroline" but less commonly, "Cyler" or "Tyline" by fans.She convinces him to save Tyler too, and ends up running from Tyler with Matt after he turns into a werewolf.Later, Caroline informs Tyler that Matt broke up with her and he comforts her. Caroline's jealous when Tyler brings Sofie to Elena's party.In Season 3 Caroline tells Tyler she didn't like the old him.When Caroline became a vampire and Tyler a werewolf, they found themselves understanding each others' situations and they ended up building an unexpected friendship. She has been in six celebrity relationships averaging approximately 3.0 years each. Exes, Sexual, Were in love, Former tension due to Caroline's involvement with Klaus after their break up; Distant/Good Friends, Former Allies; Cared about each other, Were protective of each other, Tyler was the love of Caroline's life.However, upon Klaus's return, he turns Tyler into his first successful hybrid.As a result, Tyler becomes sired to Klaus and begins to rely on Rebekah for blood.