Afraid of being in a relationship

Hello everyone! I am a 22M INTJ and haven't been in a relationship before. There's someone at my workplace that I have a crush on and she probably knows it. I really want to talk to her and tell her about my feelings for her but I'm afraid. I will be leaving my country for higher studies in a year (and never come back) and the aspect of leaving behind a loved one is daunting. There's fear of rejection as well but I don't really care about that now.

I have been having a fight in my brain where I pick one side for half an hour and come to the conclusion that I will ignore her, and vice versa. This obviously changes when I see her or remember her pretty face. I feel betrayed by my own brain and honestly starting to wonder if I'm bipolar. I turn to you for guidance and help as I don't know what should be the course of action here