After reading the entire thread, I think you should take a gap year. Your later posts sound more like a student just starting out on his/her college search than a senior making a final decision. While I believe you will more likely find your fit at Syracuse than at some random small LAC you just discovered a few days ago, I’m not going to suggest you attend this fall. You’re not ready to go off to college. If you were, you wouldn’t essentially restart the entire college search process in May.
There’s something going on and I’m not convinced it’s a sudden discovery you dislike and cannot attend Syracuse. You rushed through the college search and application process last fall and now, you’re doing the exact same thing but at the back end, in the spring. A gap year will help you step back and go through the college selection process at a more orderly and normal pace.
I agree with @dadof1, you’re careening from rock (Syracuse) to rock (Lawrence) to rock (Grinnell) without much thought. Grinnell is a fantastic LAC; it’s also in the middle of nowhere, about an hour east of Des Moines and an hour west of Iowa City. This is not an urban or even suburban environment.
Slow down. Absolutely, do not feel like you need to commit to Syracuse if you are this unsettled about the school, or for that matter, any college. You will need to talk to Syracuse at some point in the near future about your options. I think if you rush through this decision the second time around, you’ll just repeat the same mistake (choose the “wrong” college for the wrong reason) and doubting yourself in August as well.