Help pleasez...?

last month somebody confess his feeling to me..and i..well i told him that it better to be a friend..my problem is he always try to make me jealous by hang out with the other girl in our cl..well..it is not weird many girls like to hang out with him b'coz he is tall,handsome,athletics and and perfect to be bf to every girls..i really hate him.. i hate him because he laugh at my cookies that i made during the cooking cl and said something that i really don't like to hear about my cookies!! and now...when the rumour spread out that we are together and a kiss...ee uuuu with him..so what should i do..should i go talk to him or go out with him...no,don't says a date it is a worst thing ever that will i do in my entire life!! a date with him..never will happen..do i look stubborn??