Thank you for starting this thread and for everyone's replies, it has definitely helped me feel not so alone in this aspect.

I know that I am an emotional burden on my fiance. I frequently question why he is with me. I am always begging him to tell me why he stays with me, what about me is so great to love and want to be with forever, why he doesn't find someone who could love him and take care of him and be there for him more than I ever can even dream of. His answer is always the same "Because I love you." Which is such a hard thing for me to grasp. For a long time I didn't believe much in that whole you have to love yourself before you can let someone else love you, but I am paying the toll for that now...

Sometimes I feel like if I was just gone, he'd be much better off, much happier than he is now.

I am glad that we have significant others in our lives that deem us worthy and lovable and are willing to help us and support us. My fiance says "We will get better together."