Good for you!
But why tell her she can bring friends? You're interested in spending time with her, not with her friends, or...? If she wants to bring friends she'll tell you.
Next time, call her (not text) and say: 'Hi let's do <whatever> this weekend, OK?' Women, like most men, appreciate clarity. Even if they aren't clear themselves
.
And don't think about it too much. Mind games usually are counter productive.