What did you expect? Yes, you made just one mistake, but Justin left. Now he's standing with Vanessa, hugging the redhead around the waist and kissing her like he kissed you before. Now not before. He is who he is and Justin will never change, you should just accept it or try to talk to him about it and your relationship, but do you need it?

Justin doesn't even blink an eye, he knows you're there, standing there looking at them, but he continues to kiss the other one right in front of you.

— "..."