Is this weird?

Ok I like this girl. I want to tell her that I like her and maybe ask her out but I don't know if its right. This year I turned 18. Roughly 2 months ago. She's 16 and will be 17 in December. I am really struggling with this. I really do genuinely like her but I'm very torn because I don't know if it's right to tell her I like her and date her because I am technically a 'adult' and she is a 'minor'. Is it wrong to like her?