Am I a Jerk?

I had a first date 2 weeks ago with a girl that I like. Our schedules were tricky and our next date is to be this weekend. Since then I met another the girl at a speed dating event that has knocked my socks off. Everything was just perfect and I want to pursue this. I can't get her off my mind and would love to be going out with her this weekend. But I worry about hurting the other girl and to complicate things my neighbor set us up. I think she was really looking forward to our date as her life is quite hectic. Do I do the right thing and take her out and miss a chance to go out with this new love interest of mine? Ok Mr. Stud, I hate to sound too harsh but I am speaking for all women when I respond to this...