She lies and thinks it spares my feelings?

I am seperated and it is just me and my dog. I am married for almost 30 years but things changed with her 8-9 years ago, she says menopause, I say outside influences. I am now disabled for about 9 years and money is very tight with one income I love her very much and look forward to seeing her when she visits. She is always in a rush when with me but has lots of time for family and friends. She lies about why she has to leave so soon and tells me just before she leaves she is going to a cook-out. That hurts!