What should I do????????

My husband and I have been married for a little over six years. We have been unable to concieve. We have been discussing alternatives for the past year. We found out recently that my husband is unable to have children. I told a close male friend of mines about my situation and he is married as well. He currently has two children and does not want anymore. He is willing to help me. My husband knows I have a friend that will help me conceive. My husband don't know him and I don't know my friend's wife. My husband and I have already spend a lot of money running tests My friend and I both agreed he and I will be the only ones that knows who the father is. The only problem is he wants to do it natural. My friend whom I have known for years is black and I am white. I saw online where so many children was upset and hurt about how their mother's used sperm donors to conceive them. My husband and I have an approved homestudy to adopt but getting a newborn has took over a year and at the same time, its wrong to want something of someone elses. My husband says he will love a child regardless if its his biologically or not. My family are very religious, not saying I am either. I see that the only thing that is missing in my marriage is a child. We are always keeping other people children but it still is not the same as having our own. I really love my husband unconditionally and I know he loves me unconditionally as well. I see no problem telling my parents I used a sperm donor to produce a child. At the same time, miracles do happen, maybe my husband can get me pregnant. We have been having unprotected since we married because we wanted to marry before we had a family.