Damon and Lexi are those people who hate eachother's guts but will hang out with each other if they have nothing else to do.
They'll go find a random party of people to feed from together or just chill at some mediocre bar.
Of course, there's still insults being thrown back and forth like a football.
They tolerate eachother better when Stefan's around.
I have mixed feelings for Lexi. She's a great character and person but maybe there should be a better Ripper Detox strategy than torture and starvation.