Re: This girl... What should I do?
Unfortunately, my friend, you are in a situation where no amount of skill is going to change the direction of this. This girl is not even busy at all. The actual moment where things went downhill was the dinner. You said yourself that it was awkward and that the parents were clearly trying to pressure her into the relationship. This completely crushed her vibe for you, and now she doesn't want anything to do with you. It wasn't you that did anything wrong, but the parents did completely screw you over.
Let me ask you this: If your parents were pressuring you to go for a certain girl, would you be willing to do so?
I can say from personal experience my friends would not, my brother would not, and even I did not. Normal people tend to determine their own lives at their own paces. We are less likely to maintain or go for something if the world is coming down on top of us to do it. Same concept applies to maintaining a long-distance relationship. If a partner or other people are pressuring someone in the relationship to do something relative to it, the relationship is more likely to fail.
You played your game right and did everything according to the book (well except for the jumping the gun on the baseball plans). However, elements outside of your control screwed you over. It happens brotha, it's just a matter of moving on from it.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X