Sexual love is very similar to hate. If you love someone you...
...think about him/her a lot
...have feelings of inadequacy in relation to him/her
...really care about him/her
...want to control him/her in relation to you
Once you control him/her, your feelings subside somewhat or completely.
How many times has a really hot bitch made you want her by not giving you what you wanted and being a bitch? Didn't you want her a lot more? Didn't you *gasp* hate her as well as love/lust her? Also, in my experience, being an asshole and making a woman kind of hate me increases my chances with a girl. Once I get her, I need to psychologically abuse her and fuck her hard (physical "abuse") to keep her interested.
Lastly, successful, respected leaders are sometimes hated and loved at the same time.
Conclusion: Love consists of hate and the emotional propensity for abuse. Two people rarely love each other because of this. In fact, I think the only reason it happens is because of emotional blindness, incurable insecurity, conformity, and some other related reasons.