I'm sorry, and i totally understand that one of the hardest things in the world is when you are totally blindly in love with some one and those feelings aren't recipricated. I think every one has been there. One day he will be too. But not with you.
Also, the beimg friends with exs rarely, if ever works. Why do you want to be friends?? The answer i'm afraid is obvious, you want to be friends because you think if your still friends he'll some how want to be with you. That isn't a good idea, for your own.mental health as much as anything. Constantly seeing some one you want to be more than friends with.
And the signs were there, he said he wanted space, wanting space is very often the nice way of sayimg i want to split up. He in his head was no longer in a relationship with you. He did lie when he said he loved you because he knew that that was all it topk to get you back in to bed where he could have his lust sated. Amd you fell for it. When you've got some one whos so in love they cant see anything but how in love you are thats so easy to do.
Like i say, i understand its hard, its not called heartbreak for nothing, you feel absolutely broken, i get that. But he's made himself very clear be wanted space/a break he was trying to gently tell you it was over, now it is hes moved on, he doesn't want to be friends, hes new relationship cant let him be friends, imagine being his new girlfriend and the ex hanging around "being friends" and wanting more than being friends. Hes actuallh fldone the right thing by you.
I'm sorry, but your cpming across as if you were a teenager or on the jermery kyle show, which tbh, is were you'd be headed if you'd stayed friends because he'd play you and the new girlfriend off, using you both for sex whenever he wanted.
As much as it hurts, put this one down to the unrecipcated love that was actually a cunt, dust your self down, and i know that will take time, breathe and move on. He has, without a backwards glance. So you have nothing to feel guilty about when you do.