Gaming Fatigue

As much as I love gaming, I think I've hit the point where I should cool down a bit. For the last year, I've been playing at least 90 minutes a day every single day straight without stopping; even on days when I should be studying for university. I've been replaying old games and new ones, but I really need to consider how this is is affecting me.

I've been getting more tired lately, probably from burning off all my energy in my morning sessions. This has also led me to becoming easily bored from games I found interesting. Also, where I live, electricity bills are really high right now, so if I cut back a little they may not be so high.

My problem is that I play games to fill up time in my day. I have other things that kill as much time, but games are more stimulating than reading and I'm not exactly an exercise nut either. I'm on break from studying for now, but I don't want to spend every day playing games and tiring myself out.

Do you get tired from overplaying? What other things do you do instead of games?