F4Rider

I didn't pick this situation, but here I am. I am attempting to pull off "The Roomate Switch". Here's the summary...
I am 25 and met a 20 year old who I began talking with and have gone out with several times(in groups only so far) the past 2 weeks. While we have had many phone conversations getting to know each other, there is no defined relationship, but it's obvious that we've both expressed interest in each other.

I recently met and got to know her roomate somewhat, and my feelings for the first girl simply don't compare for how attracted I am to the roomate! So now the dilema I am faced with is how do I be true to myself and get in a position to pursue the girl that I really want! Is this even possible? How do I handle the first girl now? I am really fretting it, but I feel so strongly that if I don't pursue this I will regret it. Thanks...