for future reference? (ring browsing)

Emily
Background: my bf and I have been dating almost 2 years and lived together for like 1 1/2 years. I know we're going to get married someday, but nothing's probably going to happen until I graduate college in December. 
Sooo is is acceptable to email him some links to rings I like (all under $300) and tell him it's for future reference and there's no pressure?
Would you do it differently? I keep having dreams that he proposes. Lol