<human>: Can you condense the text into three sentences or less?

Hello /r/jobs! Sorry for the long post but I need advice on my current situation. 

So a little background first. I have been wanting to quit my current job as Lead SEO Analyst/Programmer for a few months due to being WAY over worked/underpaid/unappreciated and have crap benefits (boss knows I am over worked/underpaid/and unappreciated and doesn't seem to care from what I can tell) and go to another company doing just programming (better pay, better benefits, closer to home, and more) but I can't switch jobs yet because I am looking to move in a month and a half and it is easier to sign a lease when you have been at a job for more than a few months so I have waited. 

My boss does not know that I am planning on quitting and he has been wanting to increase my already over stuffed work load by adding videography to my responsibilities (I have experience in videography). In the past week he has been buying video equipment, so far only a camera, and today I am ordering more equipment of what I would need to do videos. He also told me this morning that our lease for the office is up at the end of this year so he is looking at other spaces and the size of the new space depends on how well the videos are done because he would get a space with a studio. He put extra emphasis on how much is depending on me which added even more stress.

I am at the point when I am resenting my job, am wildly unhappy, but am feeling guilty because he is spending thousands on video equipment and I am planning on leaving in a little over a month. What should I do? Should I keep my plans to leave quiet and just leave him in the lurch with thousands of dollars of video equipment when the time comes? At this point I am planning on just keeping my mouth shut until the time comes. Or should I tell him and warn him about my plans to leave so he isn't wasting money? Is there another option? There is nothing that he can offer me to keep me here. It's not worth it to me. What are your thoughts?
<bot>: boss is buying thousands of dollars of equipment for the added responsibilities to my already over stuffed work load and I am feeling guilty about it because I plan on quitting.