Di ko alam ano iisipin sa ka-talking stage girl ko

Before anything else, I'm a guy without much experince in dating. May girl akong kausap for about a month na and etong girl na'to ay kasamahan ko sa work. So eto na nga nag-uusap kami about sa past namin, and etong si girl ay nakwento na may ex-bf daw sya for about 5 years and it's her first bf daw, also recently lang sila nag break, a month ago palang kaya fresh pa yung break-up. Although kakabreak lang nila, she decided na makipag-usap pa rin sakin.

One night nag-uusap kami about something sexual, tapos nabanggit nya na nagawa nya na daw lahat with her ex-bf. And dahil dun di ko alam kung ano mararamdaman ko, i felt a bit angry at her past self, pero what can i do about it, it all happened naman na, so no use crying over it. I just felt icky about it lang. Ipagpatuloy ko pa ba itong nabubuong relationship or should i end it na? What are your guy's thoughts on this?