Questions - Love.

I am just thinking about how pathetic I must be to still, after almost a year; I dream about my ex every night.
I try so hard to just stop with the whole 'I miss him' shit. But honestly I can't help it.
Every single time I make progress with getting past everything he'll suddenly start talking to me again.
It's like I’m not allowed, or meant to let him go. I remember last time it was me finally getting past it, and having fun and then all of a sudden he calls me to ask me some stuff and we end up on the phone for 3 hours just talking about our funny memories. Worst still he had/has a girlfriend whilst this conversation was going on.
And I know after dating for 3 years it’s not gonna be easy for me to accept him moving on, but I mean it's been a year since we broke up and 9 months his girlfriend and him have been dating..It’s just so confusing when he talks to me the way he does.
So I was wondering
1) Does anyone have a few things to try and help?
2) Do I seem like a complete sook?
3) Is it possible that I’m not meant to let him go?