In total agreement with the comments above, I met my husband just over two years after I was diagnosed-- as we got to know each other, I taught him about diabetes and how I care for myself. I think that actually it’s a good way to make sure he/she is serious-- if he/she is running for the hills, then you wouldn’t have wanted them ANYWAY, with or without diabetes. The “in sickness and in health” vow is really serious. You should only want to be with someone who is ready to take that seriously.
Also, I think that loving and respecting yourself is SO important (not just because of the diabetes). If you accept yourself, diabetes and all, then someone who loves you will accept you, diabetes and all. Believe me, there will be things that you have to accept about him too!