I'm thinking about contacting an old boyfriend I recently found on FB.
According to his page he is in a relationship. I am single.
I have no wish to cause any problems in his relationship, but I would just like to drop him a line to say hello and just find out how he's doing. I have no wish to meet him in person, not while he's in a relationship.
I'm still not certain that I will send him a message, but any tips on what to say if I do? Keeping in mind that he and his DP may both read each other's FB so what do I write that keeps things light and doesn't make me look like I'm a potential homewrecker?
It's been many, many years and I keep thinking he may not even remember me, but it was a serious and very intense relationship, surely he MUST remember me ? If he doesn't I'll just crawl under the nearest rock and never come out 
original thread which has long posts by me is here
www.mumsnet.com/Talk/relationships/1667231-Feeling-stuck-and-sad-about-the-past