10 months now I'm with someone who looks like the perfect guy. Very sweet, caring, fun, witty, avoidant of fights, and wishing to make everyone get along well over pushing his own opinions.

Two days ago though he did something that is in total contrast with his character. We were out with some friends we didn't know too well, apart from my best friend whom I hadn't seen for ages. Suddenly the talk becomes about what's wrong with the world. And he starts passionately saying that overpopulation is an extreme problem, and he believes that some major physical destruction has to befall on us in order to restore goodness in the world. And other such creepy things. He ignored everyone's efforts to divert the subject, almost raised a fight, ruined the mood and my evening, and made me doubt everything he has shown me so far. Not only I saw a different person, I didn't even know he felt that disappointed of the world. I know it was just one single conversation all these months, so am I overreacting? I am planning to talk about it with him next time we meet, but it made me doubt all the trust I've put in his character, and with it my love for him. I feel much pain inside right now. I can't focus on my exams. I feel lost. What do I do?