First of all, you have done really well up to now. Congratulations! I do see that you have put quite a bit of effort into your education and are benefiting from doing this.
Given that you are from California, I will assume that you qualify for in-state tuition at any public university in California. California has many very good public universities.
I think that your chances for admission at BU are quite good. However, given the cost of BU, it is hard for me to understand why it would be worth attending over the very good public universities in California. I guess that this does depend to some extent on how much aid you would qualify for at BU.
Otherwise you have reaches. You are probably relatively close to being an average applicant at most of the schools on your list. You are a very strong student with an impressive record. However, for most of the schools on your list your chances are probably not very far off from the acceptance rate.
There are three big questions here. What is your budget? What do the NPCs show as the likely cost at each of these schools? What are your safeties?
I see your budget listed as “unsure”. You need to figure out what this is.
Another issue is what you intend to do with a degree in political science or international relations. Are you thinking of attending law school in the future? If so then you need to think about budgeting for both undergrad and law school. Avoiding debt for undergrad would be a very good idea if it is possible in your case.