A bigger issue is your own self esteem. Why do you feel the need to justify your relationship status to a third party ?
For that matter why do you feel the need for validation of your relationship status on an internet forum ?
The fact that the issue even bothers you enough to waste time thinking about it tells me there are deeper issues at work.
You can't control other peoples thoughts and words. You can only control your reactions to them.
The cause AND solution to your problem is looking at you in the mirror.