How do i tell my 15 year old boyfriend i put a hole in the condom?

Ever since i was 10 i wanted a baby and im 13 and lost my virginty to a 15 year old boy 3 weeks ago he used a condom and i told him i was on the pill when i wasn't he left the condom he was going to use in the bathroom and i put holes in it so i would get pregnant, i thort it would be ok, yesterday i took a test and found out i was. I told him this and hes ok with it he said its not like it happend on purpose he thinks im giving it for adoption when im keeping it. I need to tell him i did the i cant live with the quilt how do i tell him tho