account that's why i'm still suspecting
Any transfers between accounts on their platform mean absolutely nothing, since you will never be able to withdraw these non-existent bitcoins. The person you are communicating with who claims to be trying to "blackmail" their ex-boyfriend (glossing over the fact that if any of this were true then you are now trying to steal from an innocent user) owns or is in cooperation with the person who owns that scam website and is trying to lure you in. They will say anything to try to get you to either deposit some coins, reveal your seed phrase, hand over account details or passwords, and so on.
If the facts that the entire site is plagiarized, there are 10+ identical looking sites in circulation right now, they are asking you to deposit your coins, they are asking for your seed phrase, and literally everybody here is telling you it is a scam, are not enough to convince you not to abandon this, then there is nothing else anyone can say and you are going to lose your bitcoin.
You can't say we didn't warn you.