Can't change anything,..

I woke up this morning with the realization that I can't change most of the situations in my life that are causing me such anxiety and depression. I'm not sure how to handle this, but I feel so defeated now. I can't say I can accept the way my life is, I don't believe in laying down and letting life happen but I don't know what else to do now. My dd is only 17, even though she has a baby and a bf living here they are just kids and I HAVE to support them. Even tried to get them financial assistance but was told straight up that as long as they are under 18 and living under my roof they are my responsibility... was told to go after child support (trying) and the boyfriends CCTB and child support from his father - he's never paid before and lives on a different continent... and he's not MY kid! I'm trying to buy a business to resolve my work issues but with the financial strain I'm under now I'm afraid my credit will be ruined by the time I get my sh#t together. I decided today that I'm giving dd's boyfriend 1 month to find a job, or make a serious effort to find one, or he has to go back home to his mother. He was supposed to come here to help support the baby, not to freeload off of me. Another issue for me in the last whle is my relationship with bf... it is what it is and I can't change that. He's not ready to be in a relationship really but he makes an effort and I know he cares about me alot. It's not progressing as I would expect and still feels sometimes like I've forced myself into his life and he's just too nice to say anything. But I can't give it up, I'm not going to be the one to call it off and I don't think he'd want that anyway. He just wants/needs me to not crowd him and not pry him to talk about the past... it's hard because I'm a talker and I believe in discussing things and getting to the root of things. He just clams up if I try to get him to talk about anything serious.  But I love him and I'm being patient... I hope I'm not just being a sucker. Work is the other big thing... I hate it so much. I'm trying to put together my business plan to buy the bookstore but I haven't had tiem lately and I'm so depressed now I can't get myself going. I know if I just get started then I'll be motivated. That's my goal for this afternoon after I'm done working at noon. We'll see how the rest of the day goes.