In order to be able to give a girlfriend the amount of time she deserves, you would need time, and I just can't give her that. So, rather than being selfish or stupid enough to go into a relationship, it's just been easier to be single.
What we are shines more brightly than anything we say or do. If we are to fill the world with light, we must first face any tattered remnant of darkness that remains in our own souls.