Tell her you lost the tickets and that you're low on cash from paying bills. See what she says. If she decides she doesnt want to go out then run and find a new one. She's already tainted from you "entertaining" her lol. It's ok, we make that mistake. But if she offers to pay, then tell her you want to make her dinner (cheap and great for bringing her to your place). But do it before you go out to wherever, that way she feels ok being at your place for later when you want to extract to a seduction location (your pad).

No, dont call it a date. That puts pressure on the occasion, and pressure is bad, cause it breeds expectation. Have 0 expectation and try to keep her from having any expectations either.

And dont text that either, makes you look like you're on the defensive, and its slightly offensive to her as well, almost accusing her of actually taking advantage of her. Just say something like, "hey i think i might go to the movies on such and such day and have an extra ticket, wanna come?" And then a few hours before the movie, call her and tell her about losing the tickets bla bla bla, and take it from there.