Kapusta, I am of the school that says we always TRY (that ebing the key word) to not embarrass and offend someone else. Unfortunately some people do not get that they are intrusive and overbearing. You can either not respond to the person, ir always be “busy” when they text or call you. If the person makes you feel almsot like you are being stalked in a way, you need to be blunt and say, “You’re a nice person, but your personal remarks make me feel uncomfortable, and I really would appreciate it if you would try and refrain from making them. Please excuse me now, as I have studying to do.”
You cannot be responsible for how someone else acts, but you can be responsible for how you react to that person. If you want nothing much to do with her, do not encourage her by having a conversation.