im dating a guy whos got a girlfriend, but i want to lose my virginity to him!

clearly not a slut as i haven't slept with anyone.
i don't expect anything from him, i just want a fling.
i know it seems harsh on the girlfriend, but me and him both want this so...?

I was on a night out with my cousin and decided to go and meet this guy for a drink, i didn't like the guy i was suppossed to be meeting but his friend was drop dead gorgeous! i totally fell for him right away.
we went into town and danced and kissed he asked for my number and i gave it him. we texts for the next few days and then on one he said he was going to see his girlfriend and i was ! ! and he put i will text you tomorrow if you want? so i thought ok go on then it doesnt matter, we carried on with texting and i met up with him the saturday after he was alllll over me again, i loved the attention it made me feel great, and i have a free house this weekend iv told him we should do something and come back here, i want to lose my virginity to him. yeah i like him, but i dont love him and im using him as much as he's using me, i know it's totally wrong and awful, but i need some help! how can i seduce him so we can have sex but without him knowing im a virgin!
HELP PLEASE!!
xxx

Go ahead. If you've got enough ovaries to do it, do it. I expect a "Omg, I just wasted my virginity!111!" thread within the week.

What you need to recognize is that to him your just a (probable) decent shag and after that he WILL go back to his girlfriend. In about 4 weeks time he won't even be calling you anymore. Just bare that in mind.

in this day and age it's a bit of a tabboo

I was on a night out with my cousin and decided to go and meet this guy for a drink, i didn't like the guy i was suppossed to be meeting but his friend was drop dead gorgeous! i totally fell for him right away.
we went into town and danced and kissed he asked for my number and i gave it him. we texts for the next few days and then on one he said he was going to see his girlfriend and i was ! ! and he put i will text you tomorrow if you want? so i thought ok go on then it doesnt matter, we carried on with texting and i met up with him the saturday after he was alllll over me again, i loved the attention it made me feel great, and i have a free house this weekend iv told him we should do something and come back here, i want to lose my virginity to him. yeah i like him, but i dont love him and im using him as much as he's using me, i know it's totally wrong and awful, but i need some help! how can i seduce him so we can have sex but without him knowing im a virgin!
HELP PLEASE!!
xxx

Anyone with a bit of sense wouldn't care less about who is and isn't a virgin these days.

like i have already said i don't see losing virginity as a big deal, i just thing in this day and age it's a bit of a tabboo to still be a virginnnn

From the way you're speaking, it sounds like you aren't ready to lose your virginity at all. "Broke you in"? Really? The guy sounds like a creep, anyway, and how would you feel if you were his girlfriend?

If I were you I'd stay well away and find something meaningful, or at least someone single.

i just feel ready, i really just want to have sex, i just have this need.
iv like done things with guys, and i know this is gross but when i got fingered i did bleed so does that mean he broke me in? like broke my wall isn't that the biggest pain in your first time???