There is no doubt you are dealing with a scammer, sorry to say it. Please read the link Big Al posted for you above.
It will be a great help for other victims of this scammer if you post some relevant details about him - emails you received, pictures, documents. Be sure you delete your name before posting. If you can not post it, try, please, to forward the emails you received from this scammer and all the people contacting you on his behalf to Big Al or me - you can find our email addresses on the site under every post we made here.
No matter what, don't send any more money. Don't tell the scammer you know he is a scammer - just block him and cut all the ways he may use to communicate with you.
Help yourself by helping others - report your scammer here.Google can be your best friend
;use it if you have doubts about someone met online. If someone met online only asks for money, no matter what reason, it´s 100% scam.