A couple of weeks ago I met up with some old university friends, including one old flatmate of mine. When we lived together we supported each other through some tough times (I was in a bad relationship and he was in love with someone unavailable). Anyway, although we were young and dumb and got drunk together numerous times, the relationship was never anything other than platonic. So imagine my surprise when we met up (in a group) and I found there was this huge chemistry between us (well, in my mind anyway). Since that meeting I have found myself thinking about him a lot. Nothing remotely inappropriate happened (or was said), but I am feeling really guilty for thinking about him like this. I am married with 2 DCs and adore my DH emotionally and physically. My question is: should I tell DH about this? I don't normally have any secrets at all from him and find myself feeling remote because of this. If I do tell him then almost certainly any friendship I have with my old flatmate would be out of the question. He lives a long way away and we are not in touch online so it is very doubtful we would communicate other than the occasional email and very irregular meet-ups with mutual friends. WWYD?