Is there anyone who's in a serious(ish) relationship with someone, but, you choose to live on your own?

Is it a choice? Or, is that you aren’t able to live with your partner at this time? Is it because you haven’t gotten to “that point”, yet? What are the reasons? And, what are the benefits and drawbacks of living on your own? Do you prefer to have you own space/place (and would like to keep it that way)?