You'll get where you're going. Some time, some day, with some one. It's going to happen, but it's okay to not know where you're going, when you'll get there, or who it will be with.
You're 18, so how do you feel so old? How can you possibly feel like time is running out? Worrying about the big things doens't get rid of the small things and vice versa. It's a wonderful thing to be so in charge of our future. You can be whoever you want to be. But choose wisely, choose boldly, and choose individually. There are some things that other people should not have a factor in, and this is one of those things. You will find people along the way. Some of those people you will keep, and others you will let go of. And that is okay.
No one tells you those things. They say to go to college and they say to figure it out. But they do not tell you that you are 18 and that you have time. And they do not tell you that you will get to where you're going. Some time, some day, with some one.