Don't be a rebound!
The problem with dating your friends is, if it doesn't work out, you risk losing a friend. Just being supportive might be the best thing for now - only go for her if she's definitely single, definitely over the last one, and you are fairly certain the relationship won't crash a few weeks in. (Note - being in love with someone is not the same thing as being able to cope in an intimate relationship with them.)
Also, remember that just having AS is not enough to guarantee a good relationship. Have a go at getting to know or asking out Girl #2, but be realistic and don't assume everything will be easy. If anything, the fact that you both have AS might in some ways make it harder for both of you.
Either way, good luck, and let us know how it goes. I hope this post wasn't too negative in tone. (Sorry if it was.)