Most Helpful Girl
if you're meaning to text her "good luck" as in on a text, presentation, or whatever, then sure because it's a nice thing to do. but if you're just gonna text her "good luck" as a way of saying "good luck finding another guy or getting into a relationship again" or anything along those lines, i probably wouldn't because it wouldn't do any good to you or her
Most Helpful Guy
Yeah I think she would interpret it as you just being nice, not being clingy/desparate.