! HELP ! I really need it ! HELP !?

Well me and this one girl were really hitting it off at frist but now how conversations are getting boring and i cant think of any thing to say. for example:

me: hey

her: heyy :)

me: what are u doing right now

her: washing dishes

me: o that sucks

her:ya

me:well text me back when u done

her: done

what do i say to that i couldn't think of anything and my mind goes blank

i try asking what u doing and she will just say general stuff and ask me i will say walking my puppy. i was going to take him over there so she could see him but its too hot and he will get over heated by the time i get down there