I dunno if I agree with this "always want to spend time with them" stuff...
I don't drink and smoke to the excess I do with my friends around my girlfriend, and sometimes I choose to do those things rather then hang out with her.
Doesn't mean I don't love her. You need a balance in life.
Love is when she understands that fact and keeps her bat**** insanity under control
just remember that chances are it won't last and that it's not unique, and don't get over your head. love is a great thing, but whatever you feel now won't be the last time/person you feel it, most likely.