This can only really play out in a few ways:
Best Case: You go for it and find your friendship makes the relationship really work, happily ever after.
Just as good: You talk about it but decide not to and you guys eventually move on to other people and your friendship is stronger for it.
SO-SO: You give it a whirl, but realize you work as better as friends and stay that way. All your future girlfriends have a complex over her.
Gettin Bad: You give it a shot, but it doesn't work and there is a terrible awkward atmosphere between you two. Jealousy might ensue.
Shitty: You don't go for it and there is tension between you two. She might even be jealous of your relationships/hookups or vice-versa.
Worst: You go for it, and not only does it not work but you break up in a terrible way and lose a good friend.
Whichever seems most likely to you as going down might give you a jumping off point. Good luck!
Best Case: You go for it and find your friendship makes the relationship really work, happily ever after.
Just as good: You talk about it but decide not to and you guys eventually move on to other people and your friendship is stronger for it.
SO-SO: You give it a whirl, but realize you work as better as friends and stay that way. All your future girlfriends have a complex over her.
Gettin Bad: You give it a shot, but it doesn't work and there is a terrible awkward atmosphere between you two. Jealousy might ensue.
Shitty: You don't go for it and there is tension between you two. She might even be jealous of your relationships/hookups or vice-versa.
Worst: You go for it, and not only does it not work but you break up in a terrible way and lose a good friend.
Whichever seems most likely to you as going down might give you a jumping off point. Good luck!