How to be unattractive?

Silly question but im serious! its been nearly 3 weeks that me and my boyfriend broke up and like a week ago theres already a guy after me, and it happens a lot! I found the guy I wanted to be with for the rest of my life and he told me the same but now...

he changed and act as if im nothing to him we were together for 18 months and I dont want to love anymore and I dont want boys liking me cause ill end up hurting them, they said im a very likeable person as they said im pretty, caring, sweet, loving and kind..

I'm currently going though something like that to. You will eventually find someone you wanna be with again, but not yet, so tell them that, and if they don't like it then who cares, you don't want em liking you anyways. I have a couple of guys I've given that speech to 3 or 4 times already and they still aren't getting it, but thats really all you can do unless you wanna go the extra mile and tell them to fuck off.