How to stop speaking with others?

Everyone. I am basically an Undergraduate Student in an University in Asia. My Classes started in the Month of August 2025. Now before coming to college I made my mind in such a way that I decided that I will not speak with others but instead if anyone asks me anything, then I will reply. But after coming to the college, my friends are repeatedly trying to speak with me and want to make me their friends. But I really don't want that. Not only the friends but also the Teachers of the University are also disturbing me repeatedly. I basically don't want to take the help of others, but the Teachers are repeatedly asking me that if you have any doubts then please ask. I want to stay alone and silent. But the environment is not permitting to do that. Everytime someone is always available to disturb me. Please guide me how to get rid of these things. I want to know that how can I control myselves ?