BF roommate stole from me. AITAH

I am very generous with my boyfriend. When I stay at his place I buy dinner for us as well as his roommate.

And a two day party for the Fourth of July. The roommate came and stayed at our place for two nights. I loaned him a fan to use while he was sleeping. I noticed when he left the fan was gone. When he dropped my boyfriend off at his place, I saw my family on the floor. So I asked his roommate. Can I please get my fan back. Is oh yeah I don’t know where it is. So I said the one next to your bed, the big white one.

Am I wrong for thinking that I provided an awesome weekend for him and is a way to thank me he stole my fan? And no it wasn’t a mixup he does this shit to my boyfriend to. The thing is my boyfriend sticks up for him. No I never want this guy in my house and I don’t trust him around my stuff. What the hell should I do?
AITAH ?!?