Unable to withdraw with ITE Global Limited

I met a Chinese guy in FB dating and we've been chatting for months. He taught me how to use MT5 and he introduced me to ITE Global Limited. He encouraged me to put in as much money as I could. Because I believed in him, I put in a 2000 usd in my MT5 account. I earned a lot after few weeks of trading. The chinese guy was teaching me what to buy or sell and he would tell me exactly what time to trade. My fund reached thousands of dollars for only a few weeks. Initially, I was able to withdraw about 500 sgd but when I was trying to make a partial withdrawal again, the customer service told me that I must withdraw all my funds as it was my second withdrawal. The customer service told me to pay 0.5% of my total fund for personal tax before I can withdraw the money. I believe that this is a scam! Can anyone help me here? Thanks in advance!