I live alone for maybe 2 years now... and I had mixed experiences... just as the rest of the crowd...
First it depends on how you manage your loneliness... if you enjoy being alone, if you like the freedom it brings, the silence that allows you to meditate undisturbed... then you will feel great...
If on the other hand you hate not having someone to talk to, someone to chase away the boredom of a lazy Saturday afternoon when it is raining outside and you have no where to go... than... you will start little by little to hate it...
I for example... danced in my underwear the first morning at this new apartment... the sense of freedom was sooooo sweet that I just cranked up the volume of my notebook's speakers (poor things)... and did a reincarnation of Tom Cruise in Risky business.
