I agree with the others ... this is a relationship that should end. HOWEVER, regardless of how angry you are... DO NOT TRASH her possessions. DO NOT leave them where they could be stolen or compromised by the weather. This may well lead to unnecessary drama down the road when she sues you for damaging $5,000 worth of clothes (no, they probably aren't worth that, but people can sue for anything). And while a judge would probably never reward it, you might end up paying a token amount because you didn't 'exercise due diligence.'
I'm not even sure if can legally just 'lock her out' without a 30 day notice, if this is her legal residence, but that is for someone with more education in this area to address.
So, take her things ... TAKE PICTURES ... offer to deliver them to a mutual location, if necessary. When they are picked up, if at all possible, have her or whomever takes delivery of them sign something that says what you delivered and the condition of it.
Anybody who gets angry when she isn't allowed to borrow a truck after driving drunk, could also come back with other passive/aggressive behavior if she thinks you've 'destroyed' her property.
Good luck. Hope you find greener pastures soon.