My friend...she is not a virgin anymore...?

we have been best friends since we were little... but i moved.... she kinda screwedd up..with a guy...she lost her virginity to him..the scary thing is were really young.. and she did it again with him...and this time they took of protection....i feel awkward and scared....shes not the girl i knew...she screw up biggggg time... everyone advises me to forget her.....but i cant! we have been friends too long....but i feel she is bad and i kinda dont wanna be friends...but i cant forget her.... :[ and what if she is pregnant!!!!!!!! oh jeez what would happen then???