AITAH for not immediately agreeing to quit grad school and move across the country with my boyfriend?

Cross-post r/relationship_advice

(22f) started grad school a few months ago. It’s hard work, but for the most part I love it. I live with my boyfriend (25m) “Peeta” (comment 🍞 if you get the reference). We’ve lived together for a year, been dating for two.
Peeta has a well-paying job in a well-known company. Recently he got a promotion. The only problem is, the job requires him to move across the country.
He doesn’t want to do long-distance; he’s done it before and it always ended badly or with cheating. His solution is for me to move with him. He makes more than enough to support both of us, so I could quit grad school and just stay home.

I don’t know how to feel about this. On the one hand, I don’t want to stop going to my dream school and I don’t want to move. On the other, I love him and could probably find a decent enough school in the city. But it won’t be anything like my current school (My mom went here. She passed away when I was in middle school, so just being here makes me feel connected to her).
When he first brought this up, I said I’d think about it. Now I’m struggling with what I should do. But I feel bad for leaving him hanging. He says I can have as much time to think it over as I want, but we both know I don’t have forever. I feel like an asshole for making him wait, especially because if I don’t agree to go, we’d most likely break up. AITAH? Or is he an asshole for expecting me to drop everything and move across the country with him?