I'm a younger woman with an older guy, I'm not sure if my advice qualifies for anything, but I feel your pain and though I could maybe offer some help.
I was with a guy who was 13 years old than me and I met him when I was 23. Six years later, I "suddenly" fell out of love. In truth, things had been all wrong from the beginning. It took me quite a while to realize it, to admit I had made a mistake and to finally have the courage to call it quits.
Was I too young at 23? To be honest, I had NO CLUE what I wanted in life and in fact, did not have a clue what true love really was. I realize now that the reason why I "suddenly" fell out of love is because I hadn't really been in love with him in the first place. My limited life experience just made me think I was in love. I thought I knew what love was, but I know I didn't have a clue.
Like they say:
Love is not attachment, nor is it detachment
Love does not contain fear nor is it pleasure
There is beauty in love
There is freedom in love
There is understanding in love
I found true love... with a man who's 17 years older than me. Obviously, it wasn't an age thing that made my other age-gap relationship fail. BTW I'm 30 now.
I know it really, really hurts, but real with yourself, you admit you had problems in the relationship (altercations). Sure it was passionate, it was exciting, but true love is not built on drama. Problems don't usually get better, they get worse! Roller-coaster relationships are not healthy for you.
You're a strong independent woman... you wouldn't have gotten this far in life if you weren't! Eat bland crackers even when you're not hungry, read a book or watch TV when you can't sleep, and drag your butt back to work! You don't want to be broken-hearted and unemployed!! (PS: Don't count on disability insurance - I work in the insurance industry and broken-hearts don't make you eligible for benefits)
Right now you're grieving the loss of a loved one. It's normal to feel how you feel. It will get better. Try to think of things you can to give yourself a boost, to reorganise your life. Maybe it's getting a new manicure or your hair done gorgeously, exercising or renting movies, long walks in nature or read magazines or books in a small cafe. Keep a diary and write down all your thoughts. Reconnect with your friends and family. This time is about you and finding yourself again. It will get better, don't worry. And smile. Just the act of smiling has a magical way of making your feel better. Try it!