Here is a contrarian point of view, why I would hate living alone, here are the disadvantages. No particular order.
1) I do not have to have a dog for company (Advantage)
2) No one to do my washing
3) No one to cook for me
4) No one to do the clean up gardening, we have a Landscaper but there is always something
5) No one to clean the house, All of it.
6) No one to change the bed
7) No one to darn, fix or take up my clothing
8) No one to make nice crafty things that brighten up the home
9) No one to write letters and fill in forms for me (I hate doing that)
10) No one to get me from the Hospital after a procedure
11) No one to accompany me when I go shopping
12) No one to help me and bring me tools when I am fixing things around the house.
13) No one to clean the fridge
14) No one to help me carry stuff if it is too heavy for one person
15) No one to look after the house plants, Cacti and Orchids
16) No one to take the garbage and recycling out
17) No one to just "Be There" to gaze at on occasion
18) No one to kiss me randomly throughout the day (and night)
19) No one to say good morning and good night to
20) No one to keep me warm on cold nights
21) No one to share the good times with
22) No one to share the bad times with
23) No one to help choose my clothes
24) No one to chat to at random
25) No one to Paint the house and trim
26) No one to share things with
I could go on and on.