Wow I feel like I am reading my life story. My father had a side business that after I finished high school we founded a company in 86. Recently he sold it, he and all the money I will never see again. Like you I think I wanted a relationship so badly, that I overlooked his selfishness. In the back of my mind I guess I am not surprised. I always wanted his time but his work always came 1st, 2nd, and 3rd. I was always trying to please him, I think of myself as a indentured servant. I have been taking some time to get my head screwed on straight.
My reason for my post is to help others that end up in a family business or whatever. Get promises in writing. Don't take someones words, especially family!
Here's to moving on