How do i tell my 2nd cousin i want to marrey her?

ok its leggal in my state iv loved her sence 06 and at 1st we didnt know. all i know is im happeyest around her and i can just be me around her. she always flirts with me when im with her and iv wanted to be withe her for some time i dont care what any one thinks but her not even our familey. i realey want to spend the rest of time with her. i know i will get chastised and some ppl will have sence enough to see that love is love no mater what and give me advice fore the ppl that help thank you. for the ppl that dont well if ur raging on me ur leaving some one else alone so just bring it on her love is all i need and i dont realy give a **** what ppl want to say about it if thair just critasising me