Why?
Fell in love with someone whom i thought i knew.. Almost moved to another place to be with him. Later did i know that he was already with someone before i came into his life. And wtfudge he confidently said it straight to my face that 'he cheated on her to be with me and I'm lucky' how can someone be so cruel these days?
@Ellie000
The short answer? Lack of morals.
I'm glad you didn't move out there and waste your time. I know it's painful right now but time certainly does heal. I've been in a very painful relationship once (lots of lying and lack of respect and empathy), so I know it will get better. It did for me and it will for you. Just keep holding on. 
@TrueArrow EXACTLY. Lots of lying. Even if he was caught several times he still denies it. Its been almost 2years but still there are times that i still thought about him. I know he isn't worth it. But why is it so hard?
@Ellie000
I'd say it's a combination of two things. You remember the good times and you haven't been able to fill the void that he left. That's why I still think about my ex. Sadly, those things take time and patience. Just like yourself, even after two years, I still think about my ex. However, I know my life is better without him, even if it doesn't feel like it at times. We both deserve peace and happiness and we would have just settled on merely being "content", if we were still with our exs. I hope you are able to find your happiness one day, just keep looking forward xx