How do i know if a guy like me? what if he's has a grlfrend?

wen we wer younger me and this guy knew eachother in elemntary. he liked me, but i had no interest (he nevr knew). i've known him for 2 years now, and he liked my 2 years ago, and like him, but he's been with girls b4. i cant ask straight up becus of my feer of rejction....last time i know he had a grlfrend, but this time i dont see her, he looks at me, but since i look @ him like "whatevr" he does too, lke "oh i seen this person b4"