I have being with my husband for 21 years come Aug 18 and he is getting ready to retired this coming year from the VA I was told if I divorce I nothin

My husband has walk out on me a few time and staying like 3 night and days .. The only time he came home was because he was nasty and had to clean up his clothes were nasty women has knock at my door asking for rides and money some of those women he work with for him to take time out to take care of his business is for to curse me out .. I told him I want a divorce from him . My husband is retiring this coming year and I was told if I divorce him I will get nothing after 21 years of marriage is this true ??