Hey! So, firstly, congratulations on your UC Davis acceptance. I will say, though, that I think it's totally normal to second guess your initial excitement about uprooting yourself from home. Home is comfortable for you. Going anywhere else for a fixed amount of time (months, years, etc.) is anxiety-inducing regardless of how ready you thought you were. So I think it'd be more strange if you weren't having these thoughts (even if you didn't voice them out to anyone). Now, admittedly, I'm not in your field. So take my advice with a huge grain of salt, but I think you have to figure out what your end goal is with a doctorate degree. Many want to go into academia and that's really your only way in. If you're not wanting to go into academia, but you'd still benefit with a doctoral degree from whatever your chosen career path is, then you should set yourself up for the best possible outcome by choosing the program that will best benefit you, professionally and academically. If UC Davis is both of those things (admittedly, I'm not well versed on UToronto's academics), then I would (personally, if I were in your shoes) talk to my family, and friends about creating a self-care plan: set up weekly phone times, visits, email or Skype calls, etc. if it means you do end up going to UC Davis and this will give you a solid way to cope and adjust to the distance. Best of luck to you!