My Facebook acct was hacked and the password was changed. The person did it by going through the 'no longer have access to these accts', and then put in a different email address to get the 'password reset link' sent to, and answering my security question. My question is, am I able to 'see', or find out what email address they gave for the 'password reset link' to be sent to? I think it might have been my boyfriend that I just threw out. The only thing is, is that whoever hacked it hasn't even gotten into my account yet. It happened less than 24hrs ago.

Sorry, but no.
You need to regain your account and change ALL of the security settings.

So unless they went into my account and added that email or what the new password was, there is no way that I can find out who hacked my account?

That's it I'm afraid.
Of course there's always a court order, but that's no guaranteed either.

Wow. Because I didn't even get an email saying that my password had been changed, I guess because the person gave a new email address saying I wasn't able to access my user email, but I was able to find out that the person was from my same city that I live in. That's why I think it's my ex.

Thank you very much. I really appreciate your help.

Something doesn't make sense here. To be able to change the e-mail address that a password reset can be sent to you FIRST have to successfully log into the account. Otherwise, anyone could reset your password. So that is NOT how they changed your password. You must have been using a password they knew or figured out and then went in and made the change.

If you can recover your account, without changing the alternate e-mail, then you should be able to see that e-mail in your profile.