forbidden love

i have a long time friend who i really love the most...since we were kids..we know each other...but we only often see each other because he live in a different place...we only get together if they will have a vacation here w/ us...he became my boyfriend when we are still 2nd yr hs...but our relationship never last because of something...since then...we have no communication...

we are now 3rd yr college when our communication came back..and now i have a boyfriend and he has a girlfriend too...i still couldn't believe when he said to me that his feeling for me has never changed...and so do i...now we are back ...as BEST FRIENDS..i never still believe that this would happen...i prefer to be w/ him than to be w/ my boyfriend..same as him as well..the only problem is that...we are COUSIN'S...=( and his father and my mother are siblings...how should i get through w/ this...when my heart's truly says that i love my BEST FRIEND more...plz help me....