Future

The end of high school is coming up fast and I still don't know what I want to do with my life. I have little ideas in my head and little plans I make but I know how much it can change it a heartbeat. Parents always when first talking to you ask you the question. What do you want to do with your life after school. Normally I make up some BS answer and try to talk about maybe following my dads footsteps and going into business. I never really put much thought into what I want to do with my life after school. Now I am going out to dinner on Tuesday night with my boyfriends parents for the first time and I realized I actually have to act like I know what I am talking about and have a plan. My parents are pretty laid back people. They know I push deadlines and can get off task but I get done what I need and they trust me, but I really want his parents to like me. My boyfriend and his whole family is extremely smart, which is super intimidating and which also means they have super high expectations. I am already back at talking to a adults and now adding to the pressure of needing to impress them too. So anyways I decided made I should  consider what I am going to say when I talk about school and what I want to do with my life and not just BS it like I normally do.
The one thing I have always been interested in is fashion and shopping. So off of that I was looking into jobs that had to do with that. Ever since then I found out what a buyer is. A buyer for a company is someone who picks out everything and decides where it comes from and what the price is and when it goes in the store and for how long and you have to keep updated fashion and make sure you know what people like and what they are looking for. I was super excited when I found out this is actually a thing and I am really interested in it. So after that the next time someone asked me what I want to do I told them I want to be a buyer for a clothing or department store. You should have seen there faces. 90% of the people I have told have said "you know it is different then just shopping right?"  and "you can't shop as a job". Almost everyone I have told has not been very positive about it and seems rather disappointed in me. I continue to get the same reaction every time I tell people so I am so torn on what to do.
I also have been thinking about going to ASU after high school and as well only got mostly negative feedback from people.  First off people hate that I would be going far away from Iowa. Also everyone says "you only want to go there to party" or "every girl who goes there is a whore" and "that's the top party school which is obviously why you would go there". And yes I do realize that it is known for partying people also don't look at the good sides of it. Like for me wanted to be a buyer it has a very, very good business school and the housing there, they place you with people of your major so that you can help and work together on things. They also have a very nice fitness center which is good because I am a bit health crazy sometimes, depending on the day but still. I also kind of want to live in Arizona for the rest of my life so I would like to go to college there and get used to things down there and hopefully find a job there too.
Overall I am overwhelmed because I don't know what to tell his parents when my future comes up. If I should truly tell them what I am considering and have them judge me or make up something like I always do so they will love me and don't even have to question the fact that I wanna have a job and fashion and I might attend a school that parties all the time. Either way I hope it goes well with them.