How to deal with you feelings when your boyfriend won't marry you?

My bf and I have been together for three years and we are both in our mid tweenties. I never before felt I was ready to get married until now. I want to get married to him more than anything. He tells me that he loves me and knows that we will get married one day, but he doesn't feel financially ready now. I understand and respect hs feelings, but how do I deal with mine? I am literally crying my heart out because I want to marry him soon. Please give me an advice...thank youl.