Is there a limit on forums?

I been trying to see this one topic for a while I notice the dates on the forums go back to 2009 I am looking for a very old topic I had looked in the likes and dislikes and the relationship advice forums but with no luck cause it seems to me you are deleting some pages off cause I remember how there were more than 25 pages in those forums once they reach a certain "age" does topics automatically delete themselves or do you delete them?I'm asking cause there's this one topic with the perfect describtion on what I'm looking for and now I simple can not find it the girl's words were perfect in every detail of explaining I wanted to copy and paste in into my "about me" section on my page cause I fear what I want won't be "heard" properly oh and I got a mild suggestion is there any way you can add keywords and a search bar to make topics easiler to find?Also for people who return and can't find there old friends on this site but know there username I wish there was also a username search?Please... one more thing Is there ANY way to keep my email strictly just to ME without it showing up on my "about me" section I do not wish for people to know my email address what should I do?