So, I've actually been working on a bookmarks manager for myself (screenshot)[1].
I have this exact same problem.. so many links and no good way to organize them. My previous solution was a simple markdown file that I would add my links to and then generate an html page served through my website. But this got really cumbersome. I wanted something easier to manage/edit, so I made this.
Is anyone interested in trying this out? If so, check out my profile contact info and I'd be happy to discuss it :) I'm very close to having the mvp complete, and it would be nice to get some feedback before opening it up to the public more.