HELP ASAP! FOR TONIGHT!!!!?

If Ashley is your friend, simply ask her what she meant. The thumbs up could simply mean she is excited for you, or she may know of his interest in you. Since he danced with you and actually seemed interested in what you had to say, it would seem as if he is attracted to you, but there is not enough info to be able to tell how much farther his interest goes. Attending one of his ballgames is an innocent and friendly gesture. Just be casual and not over eager - most boys of that age do not want to feel chased and will frequently be turned off suddenly if they feel you are starting to crowd them. Perhaps you can select a good time to walk by the dugout when he can easily notice you - maybe before the start of the game before his attention becomes focused on the field. If he likes you and wants to pursue an opportunity to get to know you better, he will seize a chance to talk to you before or after the game. As long as you provide opportunities for him to approach you, you will soon know. Just don't make it obvious that he is the only reason you are there. And taking an interest in others whether male or female by being friendly while you are around him will only help to spark his interest.