Badly hurt

Hi! My bf just broke off with me a week ago after 5years ralationship . we build up our own home together when we started up. I am a divorcee age 44 with 2 kids age 20 and 15 and he is 29 years old. He told me he is very tired of this kind of life . It really hurts me bcoz it happens so sudden without any warning . I warned and advice him that our age gap is too far but he insist that he doesn't mind. I really don't understand why so sudden he leave me just like that. I beg and cried in front of him but he still wanna leave. I cannot move forward and concentrate on my business. I am very sicked and not eating for a week. I am still hoping for his returned. I tried to text him to tell him that I miss him a lot and ask him to come see me whenever he is free but he only replies he will arrange. we have 2 lovely dogs that misses him as well.