It's not healthy, and you need to move on. You don't want this to become an obsession, right? Like where you love her and hate her at the same time and start stalking her? Because that's what it may seem like.

She may very well be the only woman that cares about you and so you see her as your only option. But she's not an option, because unfortunately women look at love and the pursuit of love entirely different from men; When she knows you are in love with her (before she feels the same way) that can only make you less desirable.

It's like you're now a pair of old trustworthy running shoes that sit in her closet, the most comfortable and durable pair she's ever had. She takes them for granted because they'll always be there and she can wear them anytime she wants. But she's not going to wear those on a night out. She'll go window shopping and drool over impractical, expensive heels she can't afford. Those shoes have value because of the price, the label, and because they're in demand.

If you feel you need to tell her you love (or hate) her just to get her out of your life, then do so. But she will never change her mind now.