Board Thread:False Info and Speculative Discussion/@comment-20061173-20150619211535/@comment-25176701-20150721234654

^You are correct that the first person is always irreplaceable. Everyone will always love their first love, regardless if they're with somebody else.

But there's a difference between IN LOVE and LOVE. Since Stiles has a GF now, he shouldn't be IN LOVE with anyone else. He can still LOVE Lydia, she can still be special to him because she was his first love, but it's wrong for him to be IN LOVE with her.