I agree. If you aren't married, then you are single. You may not be "single" in the dating sense, i.e. having a boyfriend or fiance', but until there is a marriage license, you are considered legally single. That includes all the common law people. Its such a variable term that people take it too far. I too hate to see women doing laundry, cooking, cleaning, paying bills, etc. for men who aren't their husbands, or who haven't at least put a ring on it.
The sad thing is that if they do get married, the men often get very slack and are inept to meet the woman's expectations. They're like, "Well, you didn't want that before we was married, so what now?" Unless you are 95% sure you are going to marry a person, I believe in keeping it strictly a dating relationship. No living together, no joint accounts, no babies (<-if possible, lol). I am not trying to upset those who are unmarried and doing those things, that's just how I run my life. I don't judge anyone. If that's your thing, do you. But ain't no man getting any of that from me nowadays...I've been through too much. No milking the cow 'til you buy it, or at least put in a bid to buy, (and that means putting a ring on it), LOL.
I saw this lady yesterday from back in high school who mentioned something about her "fiance'." I was like, Oh girl, you have to show me the ring. She said she "doesn't wear them usually." I didn't think about it until later, but it was more apparent to me after the fact that she is likely calling him the fiance' just cuz they live together. True, you don't have to have a ring to be engaged, I'm just using this as an example of people using relationship terms incorrectly and too loosely.