This, in spades. ^
TBH I am a bit bored and tired of seeing these 'isn't it amazing being single' threads. They make me roll my eyes to the back of my head actually. At least one a month pops up, and this is 2 in two days now. A whole list of things that make it so wonderful to be single... I wonder who they're trying to convince, and the reason behind posting these threads? 
Just turn it on its head and imagine somebody who is married starting a thread like this, about how amazing is to be married, and how they'd HATE to be single, and how much more miserable they were when they were single.
And then dozens of (happily married) people coming on singing the praises of marriage, and how amazing is to be together, to be a couple, to have a soul mate, to have someone to grow old with, to go out for meals with, and to the cinema and theatre with, to go on holiday with, to look after you when you're ill, to share life's burdens and trials and tribulations with, to have a family with... etc etc...
Just imagine the kind of posts that would come on after that and how they would be ridiculed, laughed at, mocked, and berated. (And accused of being tied down, ball and chain. 'I don't need a man to make me complete' blah blah blah blah blah blah blah.) Along with the 'bleugh I HATE smug marrieds' type comments!
Some of the comments on the thread yesterday about how amaaaazing it is to be single, and you go gurrrrl etc, were bizarre. 'I can have my hair how I want, and dress how I want, and have the house decorated how I want etc etc....' What kind of relationships have you been in that mean you couldn't do this anyway? I have been married nearly 30 years, and ALWAYS have my hair how I want it, and dress how I want, and had the house decorated how I want... etc etc...
In addition, as for the comments saying 'I don't have to put up with a man snoring' and 'I don't have to put up with this farting' and 'I can have the remote control to myself' type comments. You know what? I'm pretty sure that you snore and fart too. And here's an idea. Get a remote control of your own. I've got one to myself!
And never mind 'why do married women always come on these threads with their comments!' There is a 100% chance that if a married woman started a thread on here saying how much they love being married, all the single and divorced women would come on with their twopennyworth, and as I said, all the 'smug married' vitriol would pour out! Don't even try to deny it. Plus, it's a free country! People can post what they want on whatever thread they want!!!
And don't tell me to start a thread of my own about how wonderful being married is, because ..... 1) it will receive berating and mocking, and..... 2) I don't need to tell anyone how happy I am to be married. I don't need to convince anyone. 
@Metabigot is right. You have just not found the right man - like us happily married women... And no, a lot of married women do NOT envy your singleness... if anyone does say that, they are very likely saying that to make you feel better. Deep down, most married women would NOT swap place with a single woman. Anyone who believe most married women wish they were single is deluded.
Here's the other thread by the way.
www.mumsnet.com/talk/am_i_being_unreasonable/4737902-secret-single-behaviour-the-joy?page=2