Quality time

I’ve been dating a dude for awhile now(2 years) we both have kids and have been around each other’s kids before but I feel like neither of us has bonded, I’ve told him I would like if we all spent more time together, that family time is important important to me. He has like one day off a month and says he’d only like to spend time alone with his daughter, which is perfectly fine but just once I’d like my son and I to be included. His excuse for not getting to know my son is he simply does not have time for him.