Most Helpful Guy
Needs space. He's right. You'll lose him if you keep texting him. You'll be labeled "psycho ex gf"
Keep your dignity. No more contact. He's dead to you.
Most Helpful Girl
Don't give him the time of day. He's telling you what he wants from you, and he wants you to leave him be. If you do your thing maybe he'll miss you. If you're out of the picture it will give him time to think about you and miss you in the first place. Even possibly consider making up. But don't hold your breath. You have a life too.