I still feel a deep attachment to him. It's like an addiction actually and NC isn't helping me withdraw. It's been more than a year since he left me to be with someone else. I guess I took the rejection personally and allowed it to make me feel insecure and I don't feel attractive anymore. Earlier, I posted about how he wants me back in his life right now since things didn't work out between him and the girl. He said that he realized his mistake and now he needs me and that I'm the best thing that ever happened to him. Chances are he's just saying things that he thinks I want to hear. He also had the nerves to tell me that I can't find anyone better than him, that I need him, and that even if try to stay away from him it won't work cause I'll still love him. How do I get back myself esteem and not allow whatever feelings I have for him become my weakness?

NC works but it takes time. It seems like you're talking to him though, maybe that's why you can't get over him.

He is no good for you, really try NC and be strong.

Reread your first thread and realise that as you re suggesting yourself here that he s saying the things you want to hear to get you back as his new relationship folded on him.
Your selfesteem will get a boost once you allow yourself to step back from his mindgames.
Don't have any contact with him

He wants you back now because his other GF fell through?? What a douche bag , so your expected to take him back until he finds something new again?

Kick his sorry A55 to the kerb and tell him to stop contacting you , no way should you play second fiddle to ANYONE.