Not everyone can be bubbly all the time. We arent robots although at work sometimes we are expected to be. I mean your managers have bad days- just try and brush off whatever is bothering you and put on a happy face at work.

Well it sounds like a win win situation, they want you to hand on and have put the ball in your court, Too bad you distant from family, but you can call them. If you decide to leave they will probably give a good reference. try to look at the positive. There are no problems, only solutions.
peace-Jonathan