<human>: Using a throwaway because I feel so pathetic saying this out loud to anyone I know...

Almost a year and a half ago, my ex broke up with me - he was from the UK and I from half way around the world. I was devastated and my world fell apart. There was fault on both sides and it wasn't a healthy relationship; however, I loved him with all my heart.

We kept in contact for a few months until he admitted he had a girlfriend and had been seeing her since shortly after I left. I broke off ties on Facebook etc and tried not to look or message. For months I was successful and then I caved. And nothing. I doubt he cares at all now. I'm happy he's happy, but I just cannot stop thinking about him. It takes all I have not to stalk on Facebook. I feel like I'm sabotaging my own happiness and stopping myself from moving on and I just don't know what to do anymore.

Any honest (and blunt, if necessary) advice to help my pathetic story would be appreciated. I feel like I've tried everything from counselling to cold turkey but nothing is changing.

Can you condense the text into a few key points?
<bot>: Boyfriend broke up with me a year and a half ago, I don't want to be with him but I cannot stop thinking about him and what I've lost and it's stopping me from being happy.