My friend is moving away? Do I have to pay for?

Not required, but a nice gesture as a going away gift. But if you really can't afford this right now, go Dutch and give her a small gift, something she could use for her new job and leave it at that. You are still a student while she is going off to start a job. She will understand and probably does not expect you to pickup the tab. The important thing here is sharing time with this friend and reinforcing your desire to stay in touch.

It would be nice if you did pay for your meal and if you can afford it to help her pay for hers too as moving can be expensive. Take some money or a card with you and when the server asks if it's a split check offer to pay for yours at the very least.

Find a good dine out deal on groupon and pay in advance. Or find a good 2 for 1 deal. Even a buffet is reasonable because it's all you can eat.

Do you normally take it in turns to pay, or do you each pay for your own meals? I can't see any particular reason for you to pay for her because she is moving away. You could offer to buy her a drink, perhaps, and toast the new job.

Did you invite her? Then you pay.

Did she invite you? Then she pays.

Was it mutual? Give her a quick call and say, "I'm looking forward to meeting you for dinner, but I just want to clarify. We're each paying for our own dinner, right? I just need to make sure I have enough money with me."

Assume you'll be paying for your own unless she offers to pay for it.

Who ever set up the dinner and invited the other pays,

You don't have to but it would be nice

it would be a very nice gesture but if you invited her, you should pay for it.

if you invited her. you have to pay.