Lecturer gave us all his number ages ago to send him a message in case we were going to be late for lessons or needed something and didn't have access to emails for whatever reason and I saved it to my phone. Coincidentally, my lecturer and bf have the same first name. Had a day off today and will admit I had a drink and because of this was feeling h*rny so I took an... adult picture (not nude but pretty close and meant to invoke a reaction) and sent it w an equally inappropriate message to my bf. Or I thought I did, until I got a reply "I don't think this was intended for me", which sobered me like nothing else. Scrolled through previous messages and it's the lecturer. Next class w him is Tuesday. How do I handle this?