Yay! Happy for you =)
I recently had a similar experience as i was growing closer and closer with someone ... all the while adamently avoiding the bf/gf terminology. When we paused to say, - well - we -are- in a sort of relationship even if we choose not to call it that; and both of us are very happy with this and want it to continue w/o labeling (as similar to you mostly I was hesistant as i was not ready to commit further) it was good that way.
.... except then a few weeks later he asked me to be his gf anyway and i said yes