<human>: Provide a brief overview of the text.

I moved in with my boyfriend and his 11-year-old son about 2 months ago.  The timing was pretty bad... By about 5 months ago I had already committed to giving up my old apartment, and by the time I moved in I was starting to see red flags in the relationship (going on 1 year).  I tried to chalk it up to our both being stressed out in various ways by the move.

As we've spent more time together and he's gotten more comfortable, I am seeing more of a side of him that was more easily kept under wraps before I was live-in.  Temper, contempt, unsettling world view differences, and general capacity for meanness.  

Now I'm moved in and I've become close with his kid, so I want to be as respectful and mindful as possible about the way I get out.  I see two options: Look for another apartment quietly, then one day split and reveal that I already have a place lined up (indicating that I had been planning an exit behind their backs while living here).  This feels slimy.  Other option would be to have a break-up conversation, and then deal with being around the house but no longer really welcome and/or finding a friend to put me up while looking for an apartment and deal with all that.

Any advice about this situation?
<bot>: Moved in with boyfriend and son, want to move out/break up in the most respectful way possible and minimize shitty experiences for all.