Besties to lovers

Why now

I was wondering why now that he's so obsessed with me he's so cute but like should I keep it like in the friendship zone or should I just go with the flow I really did not know so I just went with the flow so I went on Reddit and said am I the a$$hole for going with the flow when my childhood boy bestie starts touching me and most people said I am so I just wanted to kick him out so bad but I chose not to and not to listen to other peoples opinions so I said just f$ck it and I just went. With the flow and I kinda liked it so we went to sleep and he touched me he keeps touching me and I'm only starting to like it now but why....