Am I a bad person?

More and more I (25f) have started to feel that my SO (31M) doesn’t value our time together. We’ve been dating for a year and 8 months and almost every week that he doesn’t have his SS(8) my SOs BM will ask him to take his son early or watch him. And without even considering how it will affect me or our time together. I should also mention that we don’t live together yet and I commute over an hour when I want to go see him, so our time together is limited to the weekends and he has 50/50 so it’s only every other weekend that we get to spend time alone. I don’t know if I’m being selfish by wanting him to be more considerate about our time but it happens every weekend that I am at his place.