Jeremy has been very cagey about telling Ian anything involving Gillian, because he knows how the breakup affected Ian and is afraid of a relapse.That's what I thought initially. But if she's been going to Blazer, you would have thought she would be hanging out with Mike there. Which then begs the question, surely Jeremy would have seen them together, and he would have told Ian about it? He hasn't. So that doesn't make any sense, if she really is Mike's girlfriend.
By pure coincidence am sure, Jeremy is also very cagey about saying anything about Mike's girlfriend. Which, wouldn't you agree, makes very little sense if that girlfriend is someone random with no ties to the rest of the cast..?