How to jog when I'm tired?

I have to jog for 2 hours a day (120 minutes), on 5.0 speed which is a paced speed. The thing is, I get to about 50 minutes and I want to stop. I've once reached an 90 minutes but I had to stop because I was interrupted, so I know this is a task I'm physically able to do, it's just that I really don't want to do it. I try everything to pass the time, listen to music, watch TV, even put my head down and close my eyes on the grip bar. But all those techniques last for about 7 minutes. and it's just sooooo tiring, but I want to lose weight and get healthier. I also want to do a non stop jog, since that's the best way to help the heart. Is there any psychological exercises that make your mind not think about time, or go into some trance (LOL i'm that desperate) because I would really do anything to be able to do these two hours. And I have to do this everyday.