He fell in love with his ghost girlfriend and lied about it. What's done is done.

Damon: What the hell’s wrong with you? You’re not supposed to witchy migraine me.
Bonnie: You’re not supposed to kill Tyler.

Elena: The Stefan that we know is gone.
Bonnie: How is Damon handling that?
Elena: Damon is... Damon.

Bonnie: What's going on with you two?
Damon: We kissed. Now it's weird.

Jamie: Caroline and I had a talk.
Bonnie: Sounds like code for Caroline lectured you.

There's always a choice. Whenever you make one, someone else suffers.

Jamie: You really are pretty amazing.
Bonnie: Sometimes I'd settle for just ordinary.

Bonnie: It was her call.
Damon: Know what else was her call? Every bad thing ever.

Bonnie: Do you think Caroline will notice if there are only 89 red balloons?
Elena: Probably, yes.

Shane: My leg is broken.
Bonnie: Best to stay off it then.

It's not like there's Netflix where I am, you working out is my main source of entertainment.

Elena, don't go to the bridge. It's Death, Elena. Your death is waiting there.

Vampire Diaries Quotes

Oooh, you know I don't know. Every time we try and go on a date you get kidnapped, I get sent to a prison world, or your feelings get compelled away...

Damon

Damon: My new girlfriend. Andie Starr. Action News.
Alaric: It's not called Action News.
Damon: I know. I like just saying it.