Most Helpful Guy
Him saying he loves you given all this doubt just shows he's not being sincere, which would tilt this to being more a friendship than romantic.1
Most Helpful Girl
Being friends and "taking things slow" seems like such an ambiguous plan, and maybe even a waste of time. I mean I don't think he can expect you to wait around if he's not actively working towards being in a relationship with you, in my opinion. If he really liked you he probably wouldn't hold back so much and feel so uncertain.
I could be wrong, but this is how I'd interpret the situation.0