Did you ever love someone for so long that the thrill disappears?

What do I do? I love my boyfriend of 2 years, But I feel like its a point in my relationship where everything seems so mellow and slightly dull. I miss the feeling i use to have when I get shy around him and butterflies would be in my stomach. My heart would pound faster from the slight brush of his skin against mine. Now we've gotten so used to being around each other its just normal to act completely ourselves and be comfortable. Not that i don't like that but I can't help myself to think maybe i'm am slightly falling out of love. I hate feeling this way! I feel so guilty and angry and disappointed at myself. (we are both freshmen in college) My boyfriend is really sweet and caring and would never hurt me but his bad parts are laziness and doesn't stand up for himself. A small part of wants to move on and the other doesn't because I still love him…what should I do?