I found out my crush likes me, what do i do?

i have a best friend, she has been my friend since the first grade and we are in 8th now. So we were at a party at my friends house but before we went my best friend came over my house to like get ready. i was like to her "i think zack likes me" she goes "really? i don't think so." but the funny thing is is that she used to like him but not anymore. so anyway after the party she came back to my house and we had a sleepover. so she says to me "kyle told me that zack likes u." (kyle is zack's best friend but kyle has a crush on my best friend) i was like "not ah, you are just saying that because i told u that. you are lying" she said 'no i am not he just told me and said zack really likes jules and then my best friend said ask him i need to know then kyle said sorry i cant he will ask me why i am asking i totally flip out on me but so far that i know he likes her." i don't think that she would lie to me but what do i do hen i see my crush in a couple days do i ask him if he likes me, ask him out, what do i do PLZZZZZZZ HELP ME!!!!!!!!!!!!!!!