What’s an archangel ?

I once dated an emo guy. I really did, it really happened like, long, black hair it was crazy put a twirly on it, but he didn't like that. I did it anyway 'cause it's cute, and he may have like- I don't know maybe it was not okay for me to do it, but we went to this park one time and it was supposed to me super romantic, super cute, and we sit down with on the blanket and like, eat Gatorade, whatever, it was gonna be fantastic he put his hand to my forehead, like, just, boom hand on my forehead and then he read my aura, and you know what the aura told him? 

It was my aura was not compatible with his and it was mostly not compatible with his ex's and, so, I was confused, I was scared, I was worried this guys gonna like, knife me in the face?

 I don't know what emo guys do, and he told me that his ex is an archangel I don't know what an archangel is. It honestly sounds like a Magic: The Gathering card, that's all I know he told me that her ex is gonna kill me 'cause she didn't like my aura. Now, to this day, it's been years, that guy still might not like my aura. Tbh I’m not sure if it was my aura or me she hated.