Justin Bieber and Selena Gomez‘s love life is about as on-and-off as a light switch, so we’re not surprised that the two have been spotted looking very loved up since the end of last year. With their long romance being a constant series of ups and downs, we thought it would be best to give you all a brief breakdown of their tumultuous relationship – because we’ll soon be needing an annotated guide to keep up. So if you’re slightly out of the loop, we’ve got th