I know you've gotten plenty of replies and such, but I wanted to try to put your mind at ease as best I can.
My name is Meg. I've been dating my best friend, Joshua, for almost six months now. It's hard because I too seem to suffer from lack of emotions. Sometimes I truly know I could never live without him while other times, I honestly don't seem to care if we broke up or not. It's like it doesn't matter, and it bothers me. I WANT to feel, but I just can't.
The truth is, not many people know it, but they suffer from extremely mild, almost unnoticable autism that can be caused by vaccinations if they're given under two years of age. The brain is not fully developed yet, so it's actually quite hazardous to do so. It doesn't have to be noticable, and many doctors will say you're fine, but it does take an effect on your ability to feel emotions. Most likely, you had a vaccination when you were young, and that's what caused it.
This is why I'm against vaccinations to children of two years old or younger. Many doctors will attempt to push it on the parent and threaten not to even give the child any treatment if they are not vaccinated, which is horribly wrong. Vaccinations aren't a solution, but are poison to your brain. No one wants you to know, of course, and that secret has even been hidden from doctors. I managed to find it on a site from a doctor. It was called the "Blaylock Wellness Report". He explains the connection between vaccinations and autism in a much better detailed way than here.
Don't worry, you're not evil, and you're not alone.
I hope this helped.