I don't see hanging out with her as a problem. I see you having an ulterior motive as a problem. She probably/possibly sees you as just a friend (although not sure that most friends of the opposite sex disrobe in front of each other). She probably does like spending time with you, but might not like it as much if she suspected you were thinking the whole time that you want her back. Or maybe she's uncertain, who knows.
But after this much time, you shouldn't still need to do ploys to get her back. Whatever you choose to do for her or with her should just be because that's what you want to do without expectations that it's going to reap you a reward of her coming back.
Let me ask you this: If she suddenly starts seeing someone else (or is currently seeing someone else), how are you going to take it? Will you feel that you have progressed to the point you are happy on your own also and it doesn't matter?
My advice is to try to let her do the initiating more often. I get the feeling that you are always coming up with excuses to justify getting together. Why don't you find out if that's what she wants as well by letting her do the calling and invites...if she doesn't already. If she's doing the initiating, then show some patience and see where it gets you.
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
