I need advice about this guy i like

ok so ive known him since 2nd grade haha (were 14 now) bc he lives down the st frm me and so weve been ok friends that whole time but this past yr weve gotten to be better friends i guess and im starting to rele like him but idk if he feels tht way about me. my mom thinks he likes me haha but im not trusting that one bit haha. last time i tlkd to him was when we txtd for a rele long time last wk and at the end of our conversation hes like "ill talk to you later tho" and so like yesterday i txtd him hey whats up and he nvr replyed =((( so idk whats up. i see him tomorow bc theres open house and ill def try and tlk to him there. but idk if i should tell him i like him i think i have a rele good chance with him im just scared to find out it might ruin everything ..wht should i do???