What can i do now? I dont want to be a Christian?

This may spund silly but....Last week i went and visited my ex mother in law up north as i was havin a low week what with my 4yr bf recently splittin up with me and me loosin my job anyway she is a "born again christian" and i went to church with her a few times in the week to keep busy and spent 7 hrs at the church on saturday listenin to a guy that talks about healing, anyway i have never really believed but something did touch me whilst i was at church and made me very emotional but yesterday whilst i was at church with her i had 2 ladies and my ex mother in law pray for me and as they were it was so touchin i cried.... anyway one of the ladies asked me if i was ready to have Jesus in my life and without thinkin i said yes!!!! And repeated the prayer after her just thinkin that it was a normal prayer! But when it fiished they started talkin about how i was now a christian and that i had to abide to God's rules! My ex mother in law is so pleased and even gave me a bible and kept sayin your one of us now! But its not what i want altho goin to church has made me believe there is a god im not ready to give up goin out gettin drunk etc im 21 and still young and need to live my life! But now im scared! I dont kno what to do!! I dont want to upset my ex mother in law cos she is such a kind lady and does her best for me but on the other hand im not ready to give up my life!! Sorry if this sounds really silly but i have been worryin about it all nite and day!