my favourite description of love comes from a curt confession from bukowski: "love is a dog from hell".
what more does one want to know? if one has felt love, and i mean, really felt it; suffered for it; felt the brunt of despair; known the sleepless nights; the restless nights; the doubt; the belief; the constant flip flop between the two; between heartbreak and happiness; the will to endure all sadness; the knowledge that such strength will only bring about sadness; the horror of seeing in real time love end from the eyes of another; to have been crushed by a weight which could leave you without air for years and yet oddly still have the presence of mind to look back on it with tenderness; to know that lust and love are entirely separate; and one needs only a memory to keep the embers alive.
then i believe a dog from hell sums it up rather nicely.