Of course they’re real! Poke them with a stick - see, real, lol.

You probably meant to say are they authentic?

Well, that depends. If they use their sensitivity as an excuse to attack you, if they get offended all the time, tell you how bad a person you are and demand you walk around them on eggshells, then no. They’re just using you as someone to blame for their emotions.

But if they are simply hurt, can speak openly about it without blame (you might still feel guilt - that’s your problem), don’t put responsibility for their emotions on you, but may take time away from you if you hurt them - then yes, they are authentic. They might even be more authentic than you are. What if when you say they’re sensitive, what you really mean is “I’m callous”. That’s a possibility.