stolen 2015 Schwinn Ranger

I kept my bicycle on our back patio as we are on the second floor. My roommate's boyfriend noticed it wasn't there last night and asked if everything was alright thinking it might've been in the shop. I was curious why he was asking and he explained how it wasn't there anymore. I checked in disbelief; but when I did, it was not there sadly. I was planning on selling the bike and hadn't ridden in a while. It could've been stolen anytime this week (though I believe yesterday was the most likely day of the incident).