I have to questions. Okay, long story short.

So me and this guy have known ah other for a few days, and yesterday while we were IMing he admitted to me that he likes me. Which I was happy about, because I really like him too. And I told him that. But the next day when I saw him at church he seemed to kind of ignore me. I mean, just yesterday he had been telling me that he was glad that I was going to see him tomorrow, and that I should stay for the little fair thing the church as having afterwards, so I stay and what does he do? He practically ignores me. When I asked him about it, he said sorry and that it as just because there were a lot of people and family there who he hadn't seen in a long time and he wanted to talk to them. And then he said he still likes me. I'm probably just over thinking this, but do you think he was giving me an honest excuse? Or is he just not interested anymore?

Second question, he invited me to go with him and his family to an amusement park tomorrow, and I'm going.But I'm freaking out because I'm so nervous! If he still likes me, I really don't want to screw it up! Any advice on what I should do or how I should act? Thank you.