Should I end it with girlfriend?

First of all, let me just say how much I respect you. You are honest, and you tell both sides of the story. you dont try and make one person sound like the bad guy. And I have been in this situation before. I broke up with a guy because of the same reasons. I still really cared, but the feelings werent there anymore. So i told him that i still cared, but there was no point in beating a dead horse because it wont go anywhere. i think she might feel the same way, so be gentle about it, and i can ure you it wont end badly, and you might end up being friends. Word of advice: dont start dating the other girl right away. Give it some time. Hope this helps!