letting go part 2

I really don't understand how you can let go of someone when they keep coming back into your life. I am really trying to move on and be happy but its like damn you call and text. There are moments when i don't want you in my life, but then there is moments when i need you more than you know. But right now i want you to leave me the hell alone. I can't grow if your around and your not spreading your wings if your still calling me...