Very straight forward question?

My lover has stopped calling me.

The last time we talked was when we were on esctasy

I revealed that I made a fake facebook account and added his ex gf to snoop around and find out if he still loves her.

This made him quite insulted and violated.

He hasnt called me since.

I have tried to call but he is unreachble or not at home.

How do I get my love back? He has totally vanished!
How can I talk to him when he doesnt want to talk to me?
I dont want to be needy or pushy or clingy.

I wanted to put a CD with our photos under his door, but the main door of his building needs a key and I dont have it.

I want to talk to him, but how do I do this without pushing him away with my neediness.

5 days passed and he hasnt called.

I DO NOT want him to chuck me out of his life, we have gotten too close to throw it all away.

Im not even sure why he hasnt called.

Is it due to facebook?
Esctacy?
Loss of interest?

WHAT DO I DO?!

I would bet he is angry because you did not trust him to the point of going out of your way to make a fake profile to spy on him. That would make me lose interest in anyone I was dating.
Not really sure there is anything you can do at this point, it depends on how insulted and mad he is. I would not put myself in a position to let you do anything that invasive to me again if I were him. You should probably just give it time and wait and see.

Loss of interest? How about LOSS OF TRUST?

You are right--you HAVE gotten too close, but not too close to throw it all away. You have gotten ENMESHED, and that's an unhealthy closeness. You actually threw away the relationship when you sneaked around and violated his trust with the bogus 'space page.

Actually, the only thing on your whole post that makes me think he has a chance at a normal relationship somewhere down the road is that fact that he has broken off with you.

Get some help, please.

You just told your lover that you don't trust him, and that you are the kind of person who would rather snoop around behind his back than take him at his word. You owe him an apology.

I don't know if you can fix this. He's hurt and angry, and he sees you in a different light now. He doesn't need a reminder of how great things were. He needs time and he needs to know - that you know - you were in the wrong.