Ooof! Ianto wants to be fine, but willing himself to be is not going to work, no matter how much he wants it to. He will BE fine, or at least better than he is right now, eventually, but it takes time. What he's been through isn't something he can get over in a few days. He needs to understand that it's okay to NOT be fine, and okay to ask for whatever help and support he needs. He probably ought to consider therapy. It does help.