Bookish Kind of Love

Collin and Alex have been friends since they were ten years old. Collin has been there through everything in Alex's life, even throughout Alex's breakup with her ex last Christmas. Collin never left her side and picked up the pieces. Isn't that what friends are for?
On the one year anniversary of Alex's biggest breakup. Collin and Alex get snowed in on Christmas Eve. Spending the holidays with your best friend sounds like the best idea. Except Collin has a secret he hasn't told Alex. He has loved her throughout their whole friendship. Alex had thought Collin was her soulmate, but everyone thinks that about their best friend at least once. Right?
One thing leads to another, and they cross that boundary of friendship and into the territory of lovers. Now that Collin and Alex have made the big step, they try navigating this new dynamic they created.
Is it too late to go back if this doesn't work out?