try to appeal and show your bank statement (SAVINGS or current account) not credit card statement to show you have enough funds to support yourself. about your employment history error get a letter from your employer explaining the error in the letter you submit to them maybe signed by the HR head and the Manager and furnish a copy of your contract of employment. Supply more evidence like proof of your relationship such as pictures, emails, chats and also photocopy of your bf's passport showing you have seen each other.
Goodluck!
