Scam and Unable to Withdrawn

I meet this chinessle guy in FB dating app. He taught me how to do the trading. At first, he showed me that my investment will earn profit and he also showed me how to withdraw my investment to make me believe that their platform is legit. I almost invested 1000 USD and he advised me to request for an overdraft activity. He did not explain everything to me. I just learned that I need to pay the 5000 USD which was credited to my account before I can withdraw the amount that I invested.