I have 3 kids, 5, 4, and 2. All boys. SO has 2 kids, 5 and 3, one boy one girl. SO sees his kids EOWE and every Thursday for dinner. He takes them to his parents' on Thursdays, so I only see them EOWE. I just don't see them as part of our family. I do not treat them differently and anything special I get for my kids (dishes or blankets, for example) I also get for them. I am always the one who gets up and feeds, bathes, clothes them and I do the little girl's hair. But really...I just see them as the kids whom I babysit for a few days a month. I would never tell SO, and I do feel bad for thinking/feeling this way. So, how do I change my thoughts/feelings?