Thanks for your answer.
I want to tell her but I planed to do that when i'm also taken or in any other case after those feelings have gone (I hope this won't take too long). At least i planed it this way but I can't really kill those retarded feelings.
If I would tell her things could change in a bad way. And that's the exact opposite of everything I want. We're really close and I know her well but in this case I can't see how she could react.
I even thought about seeing her less or losing focus on keeping in touch but I think this wouldn't work and would be really egoistic because I'm still a friend of hers. And an abrupt step wouldn't be the smartes move.