Ona, I don't see her losing interest just because she knows - heck, it might even kindle interest, in a, "I'd never thought of it before, but now that you mention it..." kind of way. Of course, she could also go "Him? Ewwwww!" (I've had this reaction before), and that could be that. There's only one way to know, and I'll be you can guess what it is
do listen to rumour but don't put much stock in it. Until you can hear it from her mouth, don't trust anything. Of course, that doesnt mean you have to make your move right now - probably best, rather, to just act is if nothing happened, and take your own time, otherwise it just seems... rushed. Of course, when/if you do decide to go for it, check out the 'Talking to Girls v2.0' link in my sig. Also, don't let bad experiences from the past hold you back
learn from them, of course, but then move on. Best of luck, bud.