First: You are not a bother and your question isn’t dumb. Your concerns are as legitimate as anyone else’s. So let’s get to what is bothering you:
The dreams are only dreams. My guess is that you are coming to terms with your own sexuality. Although easier than it once was, it is still sometimes very difficult to come out — both to self and others. One guess is that the dreams are not about the desire to do any of those things but are instead part of your processing the idea that your sexuality is unacceptable to some people.
As for the way people’s eyes seem to you — I wonder if this is a metaphor as well. Is it possible that you worry about what other people are seeing when they look at you?
Those are just guesses. I’d need to know more about you to help you really figure out what you are telling yourself. Yes, I know you don’t want me to tell you to see a therapist. But, really, a therapist can hear your whole story and can ask questions that hone in on the meaning of your dreams and your “visions”.
At 18, you don’t need to tell your parents you want to see a therapist unless you want them to pay for it. You can see a school counselor or go to a local clinic and be assured of confidentiality.
By the way: I don’t believe in the idea that anything is “just” stress. There is no “just” to it. Stress is, well, stressful. If your problems are stress-related, you may benefit from learning some new ways to destress yourself. That’s another thing a therapist can help you with.
I wish you well.