Yes. I am in love with my husband, and we have been together for 9 years. At this point, if I weren't in love, I think I'd have noticed. But I never get bored of him, love having him around, love cuddling -- he's my best friend and so much more. And sometimes I still get a little shive up my spine when I look at him, even though it's not the fireworks I used to get just thinking about him -- my therapist told me that the initial "butterflies" are from a hormone our body secretes that makes us feel good. It's why things look so perfect at the beginning of a relationship, then seem harder later on when that hormone stops secreting.
I'm very good at distinguishing between love, obsession, and a crush. I've dated people I've just had crushes on. I knew I was not in love and was very open with the people about how I felt. I'm not one of those people who hears the words "I love you," and falls. I in fact once threatened to end a relationship with a guy who said, "I could fall in love with you so easily." I said if he did, it was over, because I did not feel the same and he'd wind up hurt. When my husband -- then my best friend -- first told me he was in love with me, I refused to speak to him for a while!
I'm obsessed with Brandon Routh! I know I'll never meet him and I don't really want to as I'm sure he's nothing like I imagine. However, I enjoy dreams and fantasies about him!
I've been in love 4 times in my life. Each relationship was meaningful. There was real love on both sides. All were committed, monogamous, and long-term. I never, ever say "I love you," first, though, no matter how much I feel it. I don't let "I love you" lure me into bed, either. I'm way too picky to fall for just words; there have to be actions to prove the person saying "I love you" means it.
Obviously, all of these are different from the sorts of love I feel for my family, my friends, or my dog!