So, you left the residence two months ago, effectively abandoning your property there? And you gave him no instruction on the disposition of your property?
When you asked him why he sold your stuff, what did he say?
And who was your or his emergency contact?
It seems, under PA law, that the landlord has to notify you in writing of their intent, and you have ten days to respond. If, however, you had no forwarding address, and your emergency contact was his father, you may be in a bit of a quandary.
You and your boyfriend are free to file in Small Claims Court for the value of the loss should you wish. If his father failed to follow the proper rules regarding the disposal of abandoned property, you may prevail.

