It very much sounds like he should not have come of his tabs , His doctor obviously felt that he needed a hand getting to grips with a little anxiety Thats why he prescribed them, He may have been been lonely until you came along , looking at it through his eyes , he probably felt he was walking on air when he met you and he felt better , anyway he should go back on the tabs and then when he feels really better he needs to see the doctor who will wean him off them , Just give him time to get straight and get them back in his system , he will feel better in a few weeks, being anxious about something you cannot pin point is a terribel thing , but citalapram will assist him in getting sleep and normality back so he can cope properly with what the world throws at him , he will be just fine ... ,