Do I leave?

So many times over the years I have thought of leaving my husband.   Then I remind myself of my vows and how people don't work things out any more and that I believe in marriage and I believe in keeping my promises and that you don't just walk away without cause.
For 30 years I have thought of my husband's lack of sensitivity and his disregard for any kind of real emotion as lack of cause.    When checks to see if I am crying during a tender moment in a movie and says "aw are you getting teary eyed", when I take him into a store and show him what I'd like for my birthday and he tells me I wouldn't like it and buys the thing next to it saying it is better, when my son says "mom are you feeling ok?" and he answers "she's fine" for me when I am actually feeling really sick...
These types of things are the story of my life.  I am a mannequin.  Just an automaticed machine who can't think for herself or have feelings.   Just the person who cooks and cleans, pays the bills and changes the oil in his car.
But I am not mistreated, he does not yell at me or beat me, he works hard at work and I have a roof over my head.   I have always complained of people with no real commitment to their marriage and how you can't walk away over the little things.
Last night I tried for the first time to talk to my husband about my issues with the children leaving.   My youngest went on vacation with his girlfriend and for the first time in 26 years I have no child under my roof when I went to sleep.
I told him I didn't want to sit around last night I wanted to go out somewhere as it was the first time in 26 years I didn't have a child at home.   He said "Are you having trouble with that?"  I thought here is my chance tell him how much you are struggling stop hiding it.   I turned to him and said "yes".   He started laughing.   Loudly and boisterously.  I wanted to die.
I looked at him and said "You can laugh, but I am serious".   He stopped laughing at me, but instead of holding me and saying it was going to be all right or he was sorry I felt bad.   His response. "well your day is coming".
My older kids were off at a camp out.   Once the youngest left I insisted on going out to the camp out to see my other kids.  We had the option to go to the camp out too, but he didn't want to .  I had him drive an hour out at 9pm and an hour back at midnight so I could see them.   While we were out there he got hit in the face with a branch and got a bloody nose.  Karma?  I hope so.
This one just makes me want to walk out the door so badly.  I have had depression, panic attacks and just been unable to handle this empty nest thing to the point I sit on here and type my heart out to strangers.  My middle son wants to know why I bottle stuff up and don't talk to my husband.   Well guess why I get laughed at.  He would never hit me, but I feel like he has.  I don't know how I will get through the weekend until he goes back to work.  I don't ever think he has hurt me this much.