Like it or not when you're dating girls casually and trying to find the right one, when you start to have success you will have success with all women! It is very strange phenomenon but it is almost as if girls can smell when you're having success with another.
As soon as you get into a relationship another girl that you previously wanted to date will all of a sudden start to want to date you, but you will have already started a new relationship. This often how single life and dating works.
What Should I Do?
This is entirely up to you. The one and only piece of advice I have to offer about who you should spend your life with is that there is always a prettier girl.
The point is you should not break up with your new girlfriend to date a girl you previously wanted to date because she is prettier. In other words there's always going to be someone more attractive than the person you're with, after all we all age.
Let me share an example from my own life to illustrate this point. I've been single for the most part of going on 6 years, mostly due to trying to make my way in the world before I commit to a woman and have a family of my own. In other words I want to be financially stable before I settle down in a serious relationship and have children.
I have since joined an online dating site and this weekend went out with a girl, then tonight out with a different girl, and came home to an e-mail from another girl giving me her phone number and with plans to get together.
Today is only Monday! Just a few weeks ago I couldn't find any girls to date and this flood of success has very little to do with the online dating site.
Instead this has everything to do with the appearance of confident. For example if you're in a new relationship you are naturally going to conduct yourself in a different manner then when you're not dating a girl. You will appear more secure confident and self-assured, and other women definitely will notice this about you.
I'm not telling you to go start dating some girl you don't really like just so you can pick up other girls you might like, it doesn't work that way. Instead I'm simply making you aware of the fact that once you do have some success with one woman and get the ball moving that momentum will take over and you'll have a pouring out of attraction towards you from many women.
If you have yet to experience this then you're missing out and if you're looking to experience this again the time is now. Sometimes you have to work the rust off and another times you have to figure out what women are really attracted to in men and then learn how to display that to women.