By that criterion, seven. My parents, siblings, last living grandparent and best friend.
I think all of them love me back. I’m sure my family do, and would like to believe my friend does.
Zero, death is natural and doesn’t bother me. Actually, what bothers me about death, is I rarely know the right thing to say to someone when their friend or someone is sick or dying.
So zero for the first part but I can probably get a few “I love you too” responses from people if I was to say I loved them too. Probably about 4 but possibly as much as 10.
Fourteen for sure. There are more on the cusp. I wish I had more room in my heart. Maybe that’s an odd way to feel.
40ish, about evenly split between friends and family.
Immediate family of four plus SO and his family of four, probably 7ish close friends, so 15 people or so. More than I thought when I read the thread title.
I don’t like the criterion. I love my immediate family (4 persons) and my cat.
Zero and… probably 5-6 the other way. Suckers.
Why don’t you like the criterion?
There are about five people that I’d say that I love, just as a disclaimer.
Under the criteria provided by the OP, there are probably about a dozen- maybe a few more than that.
By the criteria of the OP, some number in the middling two figures.
But I’d only say I love my father, my brother and my two nieces.
Well, quite a lot by your definition.
But the next day, well, dead’s dead and a hundred large is still a big wad of cash, so then you’re getting down to immediate family. And my sister can be a pain sometimes. 
4 - my brother, two of my closest girl friends, and my ex-boyfriend.
Five. And all five would love me back.
I’ll rough in at around two dozen.
Because a day when one of my friends dies is still a horrible day no matter what else happens. However I don’t feel I love them.
I guess I should also say that it wouldn’t be as miserable a day if my cat died and I won 100K. Animals die and it happens. Yet I still have a very strong love for my cat - I just feel happier around her, like I’m glowing, like my heart is going to explode with love.
Around 15, both ways.
The death of anyone I know would devastate me, and no amount of money would change that.
Yeah, I’ll have to agree with the folks who say they don’t agree with the criterion. I know a lot of people who, if they died, I’d consider it a horrible day even if I won $100,000. This includes my cats. But to fit the spirit rather than the letter of the criterion–I’ll say three. My spouse and my parents.
I’m going with 10 (Mom, Dad, Grandma, sister, 2 friends, husband, 2 kids and my cat).
I am sure at least 8 of those love me back.
Seven. And only two of them are relatives (my parents); the rest are my SO and other closest friends.
I wouldn’t go trading aunts and uncles and cousins for a hundred grand each, but if it was completely unrelated and guilt-free, I’d probably be made happy enough by the money that I’d call it a weird or remarkable day rather than an awful one. I have easily two or three dozen friends - some of whom I only see a few times a year - that are closer to me than any of my living non-parent relatives.