Is this love or blindness?

k i hav a guy friend i kinda lik. Last year there was a rumor bout liking him,well, its a long story lets just say our friendship was ruined & this year it just got restored. Iv been spending more time with him & sorta like him more & more. Its just kinda hard cuz of last year i said something in front of every1 that i do not lik PERSON we r only friends nothing but friends & will never b more than just FRIENDS!! i think he might lik me cuz hes always kidding around flirting with me but lately i think its been real flirting should i do something or am i risking our friendship again??