Binance is not a wallet, it is an exchange.

If you use 2FA and other security, and you are able to secure your wallet, your friend would not be able to access your Binance account. But exchanges should be for trading, not holding.

Exchanges are often hacked, even Binance has been hacked before. Do not leave your coins on exchanges.

Use a wallet instead of an exchange. Use a wallet, have your keys, which means you have full control over your coins on blockchain.