This parallels my own experience. I too had a "can-do" attitude 10 years ago but now just can't be bothered with many things that I used to spend time on. This, however, is not laziness, it's maturity. You have now reached the level of maturation in your understanding of technology to know that things you learn for a one-off project will be forgotten within 6 months. And you are nearly at the level of maturity in relationships to know that if your girlfriend is truly passionate about selling her jewelry that she can learn to maintain her own eStorefront