<human>: Basically, I fear that my initial infatuation (butterflies in my stomach, etc) might have been all that motivated me to stay in this relationship. We began dating our senior year of high school and remain together at uni. I care about her... I know I'd hate for anything to happen to her, and I know she's a great person. But I don't physically *feel* anything in my gut or anywhere else.

The thing is, though it's a different kind of love, I don't physically feel anything for my family, either. I know I care about them and would be devastated if something happened to them, but, again, I don't know how "love" is supposed to feel.

Is this normal, to not know whether you love someone, or should I consider talking to a professional?

Can you condense the text into a few key points?
<bot>: I don't know what love is supposed to feel like, and, because of it, I don't know whether I love my girlfriend.