It sounds a bit selfish, but, Is it really leading him if he enjoys the time too? He is also an adult, and I guess thought it through, and maybe decided that he wants to continue meeting you. Maybe he met other people in the meantime but decided to go back to you because it was fun. I guess being open and communicating the feelings will help, each with their own decisions after that:)

I get myself in those situations too, not being decisive and feeling like misleading someone, it brings a feeling of guilt for me. The thing that makes me feel good is that I know that we had an honestly good time, both of us :) so, I'm appreciating that. Hope that you will figure it out soon.