i don't know if I have ever in my life wanted to be more wrong. Typically, when it comes to matters of this nature, it's not a matter of IF someone will leave, but WHEN.
Everyone always leaves.
They all promise they won't. They say that they will stay forever. They talk about a future. A life.
But it's all talk. They all leave.
As soon as they sense you letting your guard down, becoming attached, believing them... That's when it happens...