Thats the main problem.... He's shit and can't keep hi mouth shut no matter how many times iv'e told him, when i sat down with him he looked fucked, he had not slept in days and wasn't thinking straight. I told him to delete the app as it's clearly stressing him out everytime he's sees them online and he was becoming obsessive.
He's not very tech savvy but it looks like the only option is to get his hands on her phone and install an app.
Cheers
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