TLDR; Basically, this guy my friend really likes (and dated for a short period of time) is flirting heavily with me and I don't know what I should do? I don't know how to stop him politely??
There's this lovely girl in my year that has had a thing with this boy for ages- she really liked him (and still does!) and I used to always console her and chat about their relationship 'troubles' and her 'thirst' (lol) with her on the coach home (this is like over a year ago) - her and I are still good friends- we rarely see eachother but we still talk on the coach.
Basically, I just found out the two of them started dating after exams and just called it off- I only found out they had been dating after they broke up lol. They never really acted coupley at school (this is why they broke up) and I didn't realise they were a thing- I thought he ended it completely with her last year.
He's always been so lovely towards me and I've slowly started to think of him as a good friend... but he's suddenly been messaging me on Whatsapp... he got my number from our Maths class group chat and he's been flirting so heavily with me (and asking so many questions!!). I didn't know what to do. I couldn't ignore his questions as he's in all my lessons and it would be awkward if I refused to tell him what the homework was (which he's not the type to forget)- and he's quite popular so could easily alienate me (though he's defintely not like that), so I've been replying. But because he's literally full on flirting with me, I've scrolled through the conversation and it could look like I'm playing along and flirting back if someone wanted it to look that way.
Everyone in sixth form would think I'm an absolute back-stabbing b!tch if they read the messages and it's giving me anxiety- even though I tried to stop the conversation multiple times, he keeps continuing it? I don't know what to do.. I'm awkward enough as it is and if I were to bring up the fact that I felt uncomfortable and 'wasn't interested' because she's my friend (and she's basically still hung up over him), he'd probably act like he wasn't flirting with me in the first place. I'm also not the type to say something like that until it was completely necessary - like if he asked me out on a date or tried to kiss me.
The worst part is, over the past year, before the summer and they began to date, I started to find him quite attractive and funny so.. this is making it a bit harder.