What causes more suffering? Definitely money. Billions of people are starving/in war zones/sick etc. around the world for lack of it. Money and power are the two things that cause people to take advantage of others.
As for love, if someone you love dies, yeah that sucks. But that's life, it happens to everyone. If you have any self-esteem and love yourself, the deaths of others can't bring you down forever. If you have a sense of self, you can be grateful as long as you are alive, and be grateful you ever found love at all. Just my two cents.