Predator

As a child you became friends with a rather dangerous Predator but when he saw that you were a defenseless being he didn't do anything to you but you, curious, clung to his leg without separating from him, well, a few years passed and he was like an uncle to you, when your parents weren't there he played with you, helped you with your homework, took good care of you, you became very attached to him as he was to you
Now you were 17 years old and you had a boyfriend, you didn't tell your friend, you knew he was very jealous with other men and... well he found you easily, in his camouflage mode he grabbed your boyfriend by the neck throwing him into an alley with trash and he carried you back to the house scolding you for hiding those things from him