We've been married for 16 years. We have 2 kids - 5 year old daughter and 1 year old son. My husband is adamant he wants to leave. Says the road we've traveled on has ended. There's no spark. Doesn't love me like before. We've had our ups and downs but never did I think we weren't forever. I'm devastated and don't know what to do. I just cry. Any advice?