Hi cms,
I remember you too. Gosh, you're well remembered around here!
I would like to add to other's posts here. I've had the same thing, but unfortunately it wasn't my in laws it was my own birth family (which I feel is a worse scenario).
My view is that the longer you hang around people who are ignoring you the more likely you are to end up angry and hurting. I would say to just let them go, mix with people who value you, and don't spend any time thinking about those who don't.
Whatever you do, dont 'wish it different' for that just makes for misery. Look at the situation realistically, be polite if they contact you, but don't go sucking on a stone. There are plenty of people who will value you and pay attention to you with an open heart.
Good thoughts, Myzen