my game is low as well, but i ran into an identical situation this week...
if ya wanna start hanging out more just im her if thats ur comfortable way. anymore a im or text seems to be just as acceptable as calling to set something up.
thats what i did with a chick this week, havent talked to her in a couple years, i randomly found her myspace through a friend, sent her a message said we should get together hang out this weekend....results: we are going out sat to the bar for some drinks