Thanks Dlew.
This new girl is a good person. She's really cute nd I like hanging out with her, but I never really crushed on her. I feel like I should like her more than I do. We went to dinner and a movie so far, but that's about it.
EDIT: for a fun fact. You went to high school with my ex. She said she knew of you 
This is a toughie. I think your always going to have some feelings for your ex's. And that's why you see a lot of relationships that are on and off. But you probably broke up for a reason, and that reason is probably still going to be an issue. On and off relationships usually aren't the best.
However, I go back and forth on the "we're perfect on paper but I don't have strong feelings for them". There has actually been some research on this. It can really only be explained by genetics. There are pretty girls who certain guys don't find attractive because the genetics aren't a match, and there are girls that most people don't find attractive, but some guys think are beautiful, because their genetics line up. The sad thing is, is that it's probably not going to change. And since it's due to genetics, it usually goes both ways. I dated a girl like this once. Every guy in the world thought she was gorgeous, but I couldn't see it. Dated her anyways because she was pretty fun. 2 weeks in we both realized we didn't really like each other, even though everything told us we should.
On the other hand, I have a friend who had this same problem with her boyfriend. They ended up getting married and are one of the best couples I know. Not sure if something changed for her, or she's just a more logical person and could see all the reasons they should be together.
