Taylor L. is an ex-boyfriend of Taylor S from the Speak Now era. Not much about their relationship is/was known, but media and paparazzi coverage had caught Taylor and Taylor on sets being very comfortable with each other. Taylor L. speaks fondly of Taylor S. to this day and even confirms during an interview that the song Back To December was written about him. Fun Fact: Shortly after Speak Now Taylor's Version was announced, Taylor L. was asked in an interview what he thought of the announcement. He said: "I feel good. I pray for John though." and followed that up shortly after with a TikTok of him getting on his knees to pray with Dear John playing in the background. Taylor L. is featured in the I Can See You music video released shortly after Speak Now TV.
Taylor and Taylor’s relationship ended (at least publicly) on good terms, which is unusual for Taylor S., so it is to be speculated that her apologizing in this song is related
“He wanted a bride I was making my own name; chasing that fame” can be traced back to the song Back To December from Speak Now which is about Lautner, and she talks about there how she messed up the relationship on her behalf– similar to the concept talked about in Midnight Rain