I have a young who loves me in central Africa. He asked me to marry ourselves. Myself, I am a USA citizen. I live in America. If I accept him can I get a USA visa for him ?

First its not a good idea to piggyback your question on another thread. This can lead to confusion. So I've moved your question to its own thread.

But did you not read the answers in the thread you posted to? Your question was answered. Your fiancée (assuming this isn't a scam) applies to the local consulate for a visa. After getting to the US, you get married and apply for permanent status.