I think you may be right but you don't need to get married right away. I thnk you should tell her exactly what you said and tell her you are interested, but you want to get stabalized with your health first. She needs to know you're not stalling because you don't love her or don't want to commit. Tell her you do want her, but you want to be well first. I think it's good news you have someone who cares enough to want to marry you - good luck!