That's good news, but (yes here it comes) he can change his mind or just be telling you what you want to hear.
I had these sort of fears and conversations with my niece who I had an excellent relationship with as we are very similar, I had to be careful and not too direct in not wanting her to get baptised due to the rest of my family and i was trying to keep a low profile in my fade at the time.
When she was 17 I discussed baptism with her and she told me that that decision was years away. I was so relieved and very happy.
6 months later she was baptised and planning on regular pioneering and going to bethel. i was devastated.
She is now a 20 year old regular pioneer and i have next to no contact with her at all.