Problem #1..Her "best friend" is a dude. He's either gay, trying to get in her pants or has from time to time.

It sounds like your in a shitty situation now..and chances are things will get worse before they get better. Your better off in the long run. Stay calm...all material things can be replaced. If it makes her happy to take your tupperware and coffee filters, fuck it let her have them..

When its all over..take some pictures of you getting dome from some hot piece and send them to her..or if it will make you feel better..take her lude back and give it to your new girlfreind. It shouldn't be hard to find a hot chick that wants a free car...lol.