I'm so tired

How do I let go of the man that I have loved since I was 15? Its been almost 8 years. How? I know he doesn't love me. How did things change so quickly? One day I am the best thing in his life and the next day (literally) he decided he isn't happy and doesn't want me. Suddenly he wants me again? But he doesn't at the same time? It hurts and when I say it hurts he gets mad. I am tired. It hurts so bad. I wanted a family but now it is broken. Why won't he say he doesn't love me? Why won't he say he doesn't want me. I deserve the truth.