Hey Tin,
Sounds like you are getting your thoughts together, just remember that you need to do whatever is best for you. There is no reason for you to stay at this job if you are being harassed like that. It's really terrible behaviour from those people and I don't understand why people do that (well, it's to do with their own insecurities). You are going to college and taking steps to improve your future and that in itself is a huge accomplishment!
Don't forget how great you are and you deserve to be happy in life. Have faith in yourself that you can get through this rough patch and before you know it, you will be looking back on this time knowing how much you grew because of it. Keep us posted on how you progress with quitting work