This dream means that in your real life, there is a person you like, and you are willing to be with him or her. Even if he doesn't want to talk to you (just treating you like a woman, saving typing trouble), you are afraid that he will leave you. You've been dating this guy for some time. At the beginning of the dream, you were in a car, and after driving for a while, you found that your grandmother was gone. I guess this person may be your boyfriend.
Beginners interpret dreams, please forgive me if there is anything wrong.