Is it normal my 2 cousin and i are in love?

hi its been a while my cousin and i have been dating it started when we were teens now were a bit older she is still 17 turning 18 in jan. iam now 21 we are serious about this and dont take it as a joke at all family disagrees and wants to put ristrctions on me might help for a bit but the truth is they cant really keep us apart i would understand id she was my first or closer but i cant see wrong in falling in love and it happend to be her. and now that iam older i have to wait for her to turn 18 to be able to be with her this is so niether her parants or mine put a law suit against me her mother is on our side but lately its been a big problem for her since she moved in with us for a while and now they have to leave and iam trying to finish college that way i can stand up formyself and not depand so much on my parants i need there help i know i have to wait but is it normal that they dont want us together and even after all the harm we caused everyone we still love each other.