There are different types of love. I've had many boyfriends (and an ex-husband) that I loved, on some level. But there's a difference between loving, respecting, and appreciating someone, and that deep connection that you feel when you truly are in love with someone.
So, to answer your question. I've said "I love you" many times, and meant it - but probably only two men in my life did I say it with a feeling like they were a part of me.