I got married too soon before I got to really enjoy life.
This is your problem. You should have gotten married IN ORDER TO enjoy your life MORE. Oh well.
Divorce her, let her move on with her life with someone who is able to love her. And stop fooling yourself that you love her. You're deep into justifying your actions (too young, too inexperienced, made a mistake, I feel guilty already, etc) but they really aren't justifiable.
Since you asked, well I don't know you, but it sure sounds like it.