he is moving and im in love with him...

i have been friends with someone for a little over three years.
we slept together right off the bat and it was understood we both just needed to get laid, even thought i knew i liked him quite a bit, there were no false pretenses about what we had, which was sex. we worked together so it wasn't really ideal circumstances for a relationship.
then he began to change a bit. he started showing up at a mutual coworkers house where i hung out all the time, and when i accepted a job transfer out of state, he took one at the same time and moved to the same area.
last year, we went out drinking and he kissed me in front of my apartment, the first physical contact we had since we first slept together. then he quit calling for a couple of months. when he started calling again, i confronted him about the issue, telling him "if we were just friends and drunk in a car thats one thing, but if there was something more than i need to know" his reply was he liked my "just friends" explanation, and we left it at that.
then things changed again.
i quit working with him and started a new job, and which point he started changing AGAIN toward me.
telling me some more personal things about his past, old girlfriends, and his family, and calling me more and more frequently. (we generally speak once a day.) he spends time with my family, talks about what he would call my mother if he ever saw her, things to that affect. he goes with me and my cousins (whom i am very close too) and has even gone as far as attending a family bbq!
iv spent the night on more than one occasion, but he never ever tries anything.
and now he has gotten word he is moving to oregon.
im at a loss. i wish i knew how he felt about me!?
any suggestions?