Men at my college make me so uncomfortable

Why cant men ever just be friends with women? I’m in university right now and i am in a VERY male dominated field. I knew it would be a bit uncomfortable, I also accepted that I would have to make male friends, so, I tried. When men approached me during orientation I was polite and courteous. That’s it. I wasn’t dropping hints, I was being respectful and that’s it. A lot of these men immediately interpreted my responses as interest and they began aggressively approaching me in a romantic way from then on. I have rejected them of course, but they always act entitled to an explanation and a reason. It’s so annoying because if I don’t respond I’m a bitch, but if I do I’m interested.

Genuinely why do you think you are entitled to my response? Why should I spend time with you every day just because we had a conversation on the first day of school after having one vocal exchange? Even if we did become some form of friends.. they go and ruin it by saying they like me. I mean the ONE normal guy I met confessed he liked me today. It’s been three days of school. I just met him. Like these men are so shallow, they see one average looking woman in a room full of men and go feral. It’s just annoying and frustrating. I feel like a slice of meat in front these men and I don’t think they see me as anything other than a potential romantic opportunity or even grosser.