I feel like this is going to come across as rude no matter how I say it, so I apologize.
To me, bumps are spam. They show that one person is interested in talking more about the thread, but one person doesn't make a conversation. In a perfect world, if it's just you bumping, that means you're the only one interested in talking about it... so let it go. If other people are bumping your thread, why aren't they just discussing, instead?
That being said, as someone who creates threads regularly, I totally understand that it's frustrating not to get traffic. The feeling of, "I know some people are interested in this thread, but they just haven't seen it yet because of that one early downvote." At the same time, I don't want one-word comments clogging up my threads, or threads I'm reading. That's why I think a bump button should be added. Here is an old thread of mine. It's a little outdated since this was before we had different sorting methods; if I were going to re-do it now, I wouldn't have the separate listing of bumped threads, I'd just increase a thread's visibility and add a bump counter at the bottom of each post.