Is it normal to be apathetic about thing, but still be happy?

I know that a lot of people feel apathetic sometimes and that is normal, but what I'm talking about is really long-term. And it's not that I'm unmotivated either, I do have long-term goals and plans that I am pursing right now.
I am rather content with my life, but I don't really have any deeper emotions. I do have shallow emotions though, generally I'm pretty much a happy-go-luck kind of person. I just don't care about things or people like other people do. I mean, I like people. Humans are amazingly interesting and intriguing, but I don't feel any sense of compassion to others or even my own family. It's not that I don't love them (well sort of), but I don't emotionally care about them.
I know (or I think at least) that I wasn't always this apathetic, but I can't remember the last time I had really deep, positive emotions. I was wondering if I am high functioning autistic since I do have some of the symptoms and I remember having some when I was younger, but I used to have more emotions, too.