I used the same basic username for quite a few things "nickfromstrood" and I posted a rather angsty post about my ex a long time ago... Now when anyone puts "nickfromstrood" in to Google that discussion comes up. This is a little embarrassing.. Is there anyway this can be taken off Google search results?

Nope. Here's a lesson learned - do not use the same username for all discussion boards.

It's possible to get it removed, but you may not be able to, since it's a forum and not your own site. It just depends on who you can talk to about it.

How can I prevent my own content from being indexed or remove content from Google's index?

This was answered well here: https://www.askmehelpdesk.com/forum-...st-204070.html

Check the site where your post is... some sites allow editing of posts long after posting. Go to your post there and check to see if there is an Edit option.

Is this the one you are talking about?

https://www.askmehelpdesk.com/relati...ed-113993.html