What are some flirty things i can say?

I flirt with this guy all the time- he has a girlfriend and I feel sooo badd but we just flirt and he talks about how he wants to f me and I tell him no you have a girlfreind and even if you didnt I still wouldnt and then he says yea you would and I keep...

sayin no because I most likely wouldnt even tho I like him plus he'd prbbly break up with his girlfriend if he thinks hes gettin sum -I know hes not a good person but please dont tell me about I've heard it and I know it already which is why we just flirt nuthin more.
anyways what are some flirty things to say to him when he is talkin to me

our convos; my butt, him f-ing me, I tease him and tell him his penis is small and he threatens to show me-he would really do it too but I dont look because he has a girlfriend-,

I do like him I admit-dont say anyhting bout how hes a bad boy and wont treat me rite because 1 were not going out and he says he doesnt want to go out he just wants to f =(
and I tell him all he cares about is pu$$y and hes like no I care bout girls feelings too and I dont believe him tho but he keeps sayin it- I still dont believe him!
so what are some flirty things too say to him and make him laugh ya know?

ps im not trying to steal him from his girlfriend- he touches my butt and pretends to f me and we flirt but thats just how he is we havent done anything more than not feeling my boobs or kissing or anything above except a hug ONCE SO I GUESSA ANOTHER THING IS Does this make him cheating?? his girlfriend is in high school and were in middle school 8th grade to be exact. she 17 hes 15 im 13 he thinks 13 is too yung 4 him neways. does this make me a cheatee??? I don't know you tell me. every1 at school thinks we like each other because how we flirt in all our classes together
I've never kissed a guy or had an official boyfriend so this is akward because if they breakup and with sum unknown force he asks me out I wouldnt know how to kiss him good and keep in mind hes had millions! of gilfriends before and isnt a virgin and I am im not planning on losin it to him or anytime soon for that matter. im just sayin and again dont tell me how im depserate o deserve better or blah blah
because this isnt because I haven't had an official boyfriend yet ok it really isnt I wouldnt ever do that
im not desperate for a boyfriend so dont goo there if I was desperate I would have f'd loads of guys by now. so another question is how to make out???

please ANSWER ALL please

yo I go threw the same thinggg and im lost to cause we talk bout so muchh and he got a girll

okay, I'm fifteen and I know you don't want to hear this but I went through the same thing a MILLION times with guys just like that. I know what it's like. I know it can be hard but I just think that you should try to get him to stop because his girlfriend will eventually think that something is going on. Guys like this just want in your pants. Don't make ANYONE a priority if they are only willing to make you an option. Obviously he doesn't care much about girls feelings if he is hurting his girlfriend like that. If he won't leave his girlfriend for you then you DON'T need him. If he really wanted you then he would break up with his girl to be with you and let you take some time before anything actually happened. Sorry if this didn't help.

please dont tell me about him being badd for me ^
just answer the q's

guess what? ...what? ure my hun bun.,.,

YOU'RE TOO YOUNG TO BE TALKING ABOUT HAVING SEX!!!