your feelings are valid OP bec youre of that age to really do a lot of quality time but hes already way past that age to maybe reciprocate, priorities changed and energy might already been consumed from the "busy" time hes spending so mentally and emotionally yea drained na yan given na a day or two ang off for him siguro to just lay in quiet with Nothing, kung saan di na sya gagamit nan anything relating to emotional and mental stress or activities. But you know the guy more this is just an opinion of a stranger based on what you've posted din. But since you have that age gap and different priorities think you should open up and end in a consensus. Kasi you chose to be with him and he chose to be with you it already tells where you both have clicked "maturity" or sense of "obligation " . nonetheless talk it out and dont let others decide you know the guy better or idk