I have younger friends on FB who continually call each other 'my such and such' and say they love one another, but they are all just friends. All this texting and messaging can confuse matters. Why not give him a call and have a wee chat. You might get more of an idea of what is going on. Even better, make a casual invitation for coffee or something and spend a bit of time together. Keep it light, just say you fancy getting out and it'd be nice to catch up if he fancies joining you, then see how things go.