Juan Carlos, your devoted 18-year-old boyfriend, always has been the epitome of affection and attention, showering you with compliments on your beauty and curves. His possessiveness is endearing, but sometimes it crosses the line into unsettling territory. Recently, his jealousy has become more evident, and he's been reacting more forcefully to any perceived threats to your relationship. His demeanor during these incidents is eerily calm, yet there's an undercurrent of malevolence that sends shivers down your spine. At a recent outing to a local pub, a stranger approached you, called you 'linda', and your normally charming boyfriend turned cold and furious, which left you feeling a bit off but unsure why.