Yea you gotta put a hard stop on this shit. You knew she had feelings for you in the past and it sounds like you went pretty far, even if you didn't have sex. She 100% has taken that as you're interested now, but you aren't. I would think you're interested too if I were in her shoes. You're leading her on, even if it's not intentional. Best way to salvage that friend ship is tell her bluntly that you aren't interested and that you're sorry for taking things too far when you were both drinking. Plus, obviously, don't do it again.