HKANGEL Just keep trying!! You know there's a problem and you are getting help here from others and you know what it is you need to do....those are all signs of progress.
I know how hard it is to get out of a relationship and move on. I have an idea-when you think about ending it...what are the thoughts and feelings that you experience?
Once you can identify these, it might lead you to find out what is holding you back.
I hope that helps.
Don't worry-you will do it...it's just taking you longer than you hoped.