I'm glad that you didn't listen to anyone else!!! Noone else can judge what you are experiencing and just because you are young does not mean that you are capable of loving any less than if you are older.
You and your wife were blessed with the time that you had together and I hope that those people who kept saying it wouldn't last were there for you when she died.
Sending you many blessings for your journey
You are a child of the universe and are surrounded by love in every moment of your existence