It sounds from what you are saying that you don’t get a lot of support in the environment you are in. With graduation in front of you I would suggest three things: First, I would start seriously thinking about your next step, your goal for the next year. This is your time to grow and develop your identity with your life direction. Start devoting some time to that and begin by talking to a counselor at your high school while you still have access to him or her.
Second, I would start looking outside your family for support. Check in with your friends and their plans for the next stage in their life. Find out what direction they are going in and see if that appeals to you.
Finally, if there are people in your family that do care more openly for you, like your aunt, you might want to talk to her to get support and perspective in forgeing your new plan.