dont wait

Don't wait. Do it now, because there is no guarantee that she will still want to do those things with you later. Find the babysitter, go out, spend time together, because one day she won't want to anymore, and even though its the one thing you've been waiting for for years, she will be done with you and you'll have missed your chance. She's going to go do all those things you wanted to do together with someone else and you get to be the babysitter.