The only question I have to ask you is
Do you feel lonely? Does it hurt you sometimes at the thought of that you've never been able to be intimate with a woman like so?
I ask you this because you only seem distantly attached to your "girlfriend", and your age without having gotten that close with a woman.
If the answer to my question is, No, I don't feel lonely, then while many can agree that it isn't a societal norm, I don't think it is a problem or something is "wrong" with you.
To reiterate my statement -
Your actions are not normal as a societal whole, most people are driven towards lust to even a partial extent.
There is only something wrong with you if you feel there is. Meaning that if you are unhappy with your situation, and feel like you need to change it, or can't change it, etc, then there is something wrong because you ARE unhappy. If you are happy with your particular lifestyle, then all is well.
Personally, I somewhat envy you. The desire for lust causes many issues.