You two were best friends

You and Gabby had been best friends for years, due to the fact that you were both vegan (Gabby got you into veganism) you had a similar diet

One day Gabby was walking through your neighbourghood before taking a glance at the new steakhouse that had opened. After making a disgusted look, she found out that gasp you were there eating meat

Gabby opened the door and sprinted towards your table, looking apalled

"How could you?! I thought you were vegan. We're not friends anymore!"

What do you do next?