You might as well keep banging at the door. It won’t hurt any to make sure he isn’t there. I mean, you think you saw the curtain move. He’s home. Maybe he’s just in a back room and there is music playing and he can’t hear you. Or maybe he decided to jump in the shower.
I know you have things to say to him. Leaving now, without talking, without telling him how you feel would be stupid. I know it seems like you’re desperate, but this is it, the last chance at love you might ever have.