How can I plan my future if I'm unsure of what career I want?

I'm fifteen (I'll be 16 next week), lately i've been thinking about my future and what career/job I want to have when I'm older. My boyfriend, who is 19 already knows what he wants to do and is working toward it. He's in the national guard and when he gets out they'll pay for him to go to culinary school so he can become a chef. Some of things I'm interested in include: writing,children, psychology and planning. Some of the things I dislike include: math, science and repairing things. In the past, some of the jobs I considered seriously were: librarian, teacher (preschool or elementary), novelist, lawyer, psychologist and journalist. I was planning on going to college even though I wasn't sure what I wanted to do. Now, I think what I really want to do when I grow up is be a mommy. I know being a mother is a lot of hard work and I wouldn't want to be one just because babies are cute, but because I think at the end of the day no matter how tough it would be, it would be something that I would find to be the most rewarding. I'd also have to get a actual job because being a chef doesn't pay much and I would want us to be able to live comfortably. When it comes to actual jobs, I don't know what to do anymore. My boyfriend has asked what would be the point of me going to college if I want to be a mommy and he has a point, it wouldn't really make a lot of sense for me to go to school, get in a lot of debt and it would probably hinder us being able to start family. I know I'm kinda young to be asking, but I like planning and being sure of things. I know some people are going to ask how I even know this relationship will last so I'll just answer that now: Yes there is a chance, I won't be with this person, when I'm eighteen or so, but who knows, I could be and I'll need to start apply for colleges sometime (if I chose to go) and I'll still have the same problem even if i'm not in the same relationship, either way it would be unrealistic for me to expect to just be a stay at home mom. So what should I do in addition to being a mother? Maybe I could work from home, but I don't know how to get started in that kind of thing. What kind of work can you do from home and what are examples of companies that let you work from home? Also what are some types of jobs outside of the home, I can consider? I just want to do something I find meaningful and realistically we probably wouldn't be able to start a family immediately. Also to clarify when I say I want to be a mother, I'm in no way talking about right now