You are corresponding with a 6'4", 300lb Nigerian male who has used a picture of someone else off the net. This is what he probably looks like.
http://www.bdb.co.za/shackle/images/joe_eboh_caption.jpg
There are thousands of these refugee scams.
http://www.joewein.de/sw/419-penpal.htm
http://www.stop-scammers.com/scammer.asp?id=4102
http://www.dymaxionweb.com/condrome/archives/cat_investment_partner.html
Here is Keren Ebue unmasked as a scammer.
http://www.delphifaq.com/faq/russian_marriage_scams/f5516.shtml?p=0
If you remember one golden rule only this is it.
NEVER send money to someone you have never met by Western Union. It is untraceable and irretrievable. Anyone who asks you to send money this way is 100% GUARANTEED to be a scammer.
You may not have been asked to pay anything yet, but you will be.
Also beware of money laundering. If you are sent a cheque to cash, it will almost certainly be fake. You cash it and are asked to send some of the money elsewhere, by Western Union.
You do so and a couple of weeks later the cheque bounces leaving you liable to the whole amount.
Cut off all contact with this person.