So me and my partner have been together a few years now and have a son together. I have 2 kids from a previous relationship. We have been on holiday once all together but apart from that we rarely do anything all together as he works everyday apart from a monday. Anyway so he messaged me today saying he is taking his nephew out on monday 2 and a half hours away for the day to a theme park. Now obviously I dont have an issue with him spending time with his family BUT he never mentions us and the kids doing anything together he will never drive far for me and I basically had to persuade him to book us a holiday for the end of the year. Monday is the only day we get to do anything which we never do anyway as he is always too tired or full of excuses yet hes now planned to go away without involving us for the day. Am I being stupid for getting annoyed over this?