Repeat after me:
“Alec Lightwood is not the first person to love deeply and truly the High Warlock of Brooklyn, Magnus Bane”.
“Magnus Bane have loved truly and deeply many other people/beings in his extended lifetime before Alexander Lightwood”
and you know what’s great about it?
It’s F I N E. Really, it’s okay.
It doesn’t diminish Malec’s love story.
Because love is so much more than the “first time he has ever been loved” or “first time he has ever felt this way” tropes.
Anyway, I’m not that relevant here, but here’s my piece of thought about it.