A bit confused!

Rach
My SO and i are both 21 and have been going out for 18months, we talk loads about our future together and moving in together getting married and have kids etc but have decided that we will wait to do all that when he finishes uni and qualifys as i cant afford everything on my wage alone. He knows how much i wish we cud do it sooner and not wait another 3 years but its financially sensible to wait! However the past few times we have been near jewellery shops he stops and looks at engagement rings and asks which ones i like and asks why i like it or why i dont like it. Im really confused as to why hes doing that. What do you think, do u think hes planning on proposing sooner? Im Just a bit confused.