always great to read of a new convert to our sport..It will keep you sane for the rest of your life and full of energy for life, even when you get old.
As to the girlfriend..One of cyclists challenges, finding a significant other who shares your passion for cycling...Don't give up on her if you care for her. Convert her to your sport, if she is willing..You will encourage each other.
As to needed emergency food to prevent bonking...My favorite power bar are Cliff Apricot or Power Bar, "Harvest"brand..A whole grain bar,particularily 'Cherry Crunch.' In case you really bonk, big time- don't forget energy gels.