Say something like: “It’s flattering to hear you say such a nice thing to me. However, I am not interested in a relationship right now as I am focused on other things which are important to me. " Or: “I appreciate your interest in me. I don’t feel the same way about you though. I like being friends/classmates but that’s all it is to me and that’s how I want things to stay. " Or: “That’s kind of you to think of me this way but I’m actually interested in someone else and it wouldn’t be fair to you to pretend that I don’t have feelings for another person. "

Make it clear that you don’t appreciate any continued attention and will ask someone to intervene if the crush doesn’t stop the unwanted attention. Say something like: “I have already told you that I am not interested. I am repeating this now because I mean it. I am not and will not ever be interested in dating you. Please respect my decision. "

Spit on the ground or sniff loudly; pick your nose openly in front of them. Make snorting noises when you laugh near them. Eat in a messy and ill-mannered way if you’re having a meal with them. Or, talk to them with food in your mouth. Eat garlic or something else that is pungent, then talk to them with foul breath. Get close for a stinky whisper in the ear. Curse in this person’s presence if they’re the sort to find this offensive.

Don’t reply to notes, texts, IMs or emails that this person sends you. Don’t send Valentine’s, holiday or other cards to this person, not even if they have sent you one. If you get paired with them for a class project, only talk about the project and what needs doing. If they try to talk personally, ignore it and only discuss the project. When class is over, avoid the person.

Tell your friends that you’re worried that this person might stalk you or try to pressure you if he or she isn’t clear that you’re not interested. Ask them to be on the lookout for such negative behaviors and your friends will soon be more interested in supportive sleuthing than joking about it.