If I were in a relationship id feel no need to tell my so about this account.
I mean it ain't a dating website or anything. Hell, maybe only one or two friends know of my accountand that's just because they found out by accident, following which I faced having to try and explain it in a way that doesn't sound lame.
Currently single. Some of my friends know about it. I tell them about the articles that I've written and ask what they think about some of the questions I see. One of them opened an account a while ago, but has since been inactive. If I were in a relationship, she would know about it.