What is he going to tell me?

So in the beginning of this month, last day of school I was walking to get water and the guy I like friend said "Tell her now!" and he said "I know" and he got next to me but he got quiet and didn't tell me what he was gonna say and I got disappointed. But im going to see him on Wednesday at band summer camp so maybe he'll tell me whatever he was gonna say. Btw he knows I liked him ever since 7th grade (were going to 9th grade now, high school) but he was always quiet and didn't say anything soo what do you think he was going to tell me?