Special concerns and opinions\suggestions

I've been on birth control before... the depo shot and the nuva ring...I really like the nuva ring but it costs so much the depo makes me gain weight and the pill isn't worth my time...I have sex 1 every three months becAuse my man is active duty army. We may be living together soon so that means at least sex once a week or two for us... We probably will marry within the next year but I don't want to start a family till at least 1-2 yrs after marriage. Any suggestions for a useful birth control option in regards to my sex life and child planning? Thanks