How do I talk to him about a ring?!

Summer
My SO is very interested in what kind of ring I want. Which don't get me wrong is great! However, I know I have expensive tastes and don't want to pressure him into something he can't afford. I want a nice ring and always dreamed of having one that gets noticed, because I constantly notice other women's rings. I know what I want but I don't know the words to explain it and I get anxious when we tried to take me to a jewelry store or show me online. Help?