Friend zone?

I've been talking to and seeing this guy. He's 18 and I'm 16. We have met up around 3 times and he's really lovely. We never run out of things to say and he's really an amazing guy.I think he's attracted to me, he told me I am beautiful but I don't find him attractive. I feel so bad because he's so nice. My mum said it might be better to stop talking to him to not hurt his feelings but I've told him I see him as a friend and he seems okay with it. I just don't know if he really means that or hopes that I will develop feelings for him later. I'm really confused. What would you do in this situation? I don't want to hurt him.