Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

It is not necessary for a person to see visions or dreams after making istikharah. Istikharah is meant to seek the help of Allah in facilitating the task or work you are considering. You are asking Allah: if it is good for me then make it easy for me to achieve. If, on the other hand, it is not suitable for me then turn me away from it and turn it away from me.

 

So, if after istikharah you made the proposal and he accepts the offer, then you should think it as a positive sign.

 

If he is suffering from a medical challenge, which is going to affect your married life, then you are not bound to proceed with it unless he gets the necessary treatment. If however, you are willing to accept him as he is then you may do so; it is up to you.

 

For details about istikharah, you may look for the answers posted on this site.

 

Almighty Allah knows best.