The problem occured today when my friend had ahold of my phone and was checking out my apps and saw "Root Browser" and I said it browses all my files. I guess he wanted to see if he could find any form of porn on my phone. Any who, he fiddle farted around, foumd a document that was 157MB or 175MB and was like hey do you want to delete this? (my phone kept saying I only had 200mb freespace left and a bunch of files were taking up like 11GB idk how.) and I told him sure to get free space and he didn't say what the name was. He later told me it was firmware that he had deleted. But before I had any idea it was deleted I powered my phone off for about an hour or two and went to class. I turned it on, and it would vibrate ~3 seconds, say Galaxy S3 and then boot loop again, and won't go any farther. Is there any way to put firmware back on my phone with odin or anything? Because my parents have no idea my phone is rooted, so I really want to avoid contacting Verizon and trying to get a new phone. Also I want to try and keep all files. I could factory reset, but with common sense it's telling me that will delete every photo, text, contacts, etc.
Also I can sometimes get it out of a bootloop (Usually do a system format in CWM) but then it tries to start and freezes when it says Galaxy S3. So that is another huge problem. WOuld finding stock firmware and replacing the root be possible?