So i like this guy but he is my best friend resent ex.?

so i like this guy but he is my best friends resent ex. they broke up almost two months agoshe has a new boyfriend now and seems happy. she is always bashing her ex when me and her are together, saying like how horrible he was and all this stuff. but he isnt really a bad guy she just exaderates. but anyway i like him but im afaid that ahe atill might have feelings for him n i dont want to ruin or friendship what do i do???? p;ease help