Me and my cousin are both deeply in love. is this normal?

Both me and my cousin have always had something even when were little. We both lived far away, never really kept close contact but when we occasionally met when little, we would act differently compared to around other people. Only until the begining of this year had she fully come into my life moving into our nan & grandads house. She had a boyfriend from where she came from but asked for my advice on how to break up with him as it wernt working so i helped naturally, but then less than an hour after i helped her she confessed that she loved me. At irst it scared me to think that thats what i heard, but after some thinking i started to date her. After a week we both got found out by our family which was mayhem so we had to end it, but when we saw each otherr after that, our feelings were still there so we started it agin, but once again our family got suspicious so i had to do the decent thing and end it. It wasnt until recently when i set her up with my best mate had we really done anything. He went away for a week and she came round mine, i went round hers and we started to turn each other on. In the end this lead to me fingering her but when my mate got back we had to end it. But now recently weve started a full relationship and my mind is all over the place. Im 18 and shes 17 in december so were both of legal age but im worried about our family finding out and destroying us as im so madly in love with her and vice versa. We close to having sex and i really want to be with her and be there for her but its the little things that is stopping us. Apart from our family only 2 of her friends know and one thinks its perfectly fine but the other thinks nothing of it. What do i do. I adore her and we have a huge connection between us and i dont think we'll ever stop our little relationships but i want a full relationship with her. Someone please help!