hey all, long story.. appreciated if u do read it through

background story to get an idea..

i have a situation where my bro has been seeing this girl for 2 years.. at her bday party i got introduced to her sis.. gamed her that night (she seemed interested b4 gaming tbh)

she added me on facebook.. got her msn then # close. few weeks later after chatting for a bit got invited to my bros gfs house for a movie night.. sis was there n we end up hooking up. chatted afterwards and and then at my bros party hooked up again. after this i thought id blown it and chatted very rarely on msn after it, having hooked up with other girls in the mean time.

however it has sorta reinitiated.. she started her final school exams and i sent her a goodluck message just like everyone with exams.. and she starts talking to me again on msn.

the 'flirtiness' comes back, you can tell, and her sister (my bros gf) tells her to come salsa dancing that her sis n i both do. she came n im pretty sure the sole reason was cause i was there.. she was more interested in chatting then dancing lol.. i didnt give her anything cause her sis was there (awkward at the time.. afc) n it feels like i blew the chance for the final time. however she talks to me on msn usually first.. theres still interest. now when we talk, some of the convos have gotten flirtacious.. yet some are boring as watching grass grow

lately.. these convos have been dying down, tomorrow she has more final exams until end of next week. im thinking of completely shutting off communication.. enjoy the weekend and see what happens there.. but it sort of hits a sweet spot for me cause theyre both sisters and we're both brothers.. maybe its the worst move in the world im not sure yet..

what my final question i guess was.. is this relationship worth pursuing cause i know it has potential (like i sed ive hooked up in between so i havent been stuck on her.. just this re-initiation has got me interested again) and if so continue off gaming as i did when i first knew her? SPAM only when i talk to her i feel like im forced into 'so how was ur day?' situations.. i turn to you guys on this one.. thanks for reading and responses!

any tips guys?..