How should I go and propose him?

i met a guy in an cultural event who belongs to my skul and also in same standard,v bcame gud frndz n den after which he broke up with his galfrnd and after which he tol 1 of my bst frnd dat he haz a crush on me n one fine day he asked me out by sms and i said no n tol him dat i had brotherly feeling towardz him n still v wer gud friendz after which also he asked me 2 recnsider my decision twice but evrytime i refused...but diz days i thnk i have startd liking him n moreova i feel jealous wen eva he talks to my frnd(female wuz comitted) really well i feel like he givz more importance to her rather dan to me .......shud i go n confess my feelings to him or not?plz help me out.........i want huge no.of replies.........................