I feel second best

My dad and step mom live in OKC. My husband and I use to live in Wichita, KS. It's about 2.5 hours away. Easy enough to coome up for a weekend. Well, they would come up for less than 24 hours, or sneak up to see my Aunt and Uncle who live in the same city, but not tell us. They barely stayed long enough for our wedding. Here's the kicker. My step sister lives the SAME distance away West of them, and they'll go see her family every other weekend. We can't host the holidays at our house, because it's "too far for M to drive with her kids. It's too much." Whatever. We gave up. So anyway... we moved to Mobile, AL. I completely understand that it's really far away from OKC. But I miss my dad. My sweet hubby offered to buy my dad a plane ticket to come see me. But he didn't take it. I talked to my dad tonight and he is very aware of how I feel. But they have trips booked to go snow skiing in NM, Vegas for my Aunt's birthday, and Memphis for a friend's birthday. But no trip to come see me.... Am I wrong to be this upset? Should I let it go? I don't know what to do!