Ex's friend likes me? And is telling everyone..?

[Psychology]

Sorry it's long..

Okay, so. I broke up with my ex around 3 months ago because I didn't feel the relationship was right/ or going anywhere. We were only together for one month so it was nowhere near serious. I was his first girlfriend and he was my first boyfriend (if it even counts).

Now, his friend who I had met once while I was with my ex, and recently have spoken to on the way to/from school around 4 times since we broke up has been telling my best friend's boyfriend how much he fancies me/ he thinks I'm pretty etc..The problem is, he's literally telling all of his mates, and even some girls that go to my school. (I go to an all girls school and he goes to the all boys school next door).

My ex even text me yesterday saying his friend wants to go out with me. I don't want to talk to my ex seeing as he and his new girlfriend (who is in the year below me and has never spoken to me before) has been saying horrible stuff about me which is not true.

Quite a few people in my year at school have spoken about how he likes me, even people I don't know very well. I feel uncomfortable with all these people knowing and being in my business.
I don't like my ex's mate in that way, especially as I hardly know him (and he talks about me like he knows me, which he doesn't) . He doesn't have a phone/facebook so I can't speak to him unless he walks in the mornings.

It's a compliment he likes me but I've made it clear I don't like him.
What do I do about my ex and his friend?

Thanks in advance x

[Dyy]

ignore him he is a idiot