Hell summer

Exercising now. Feel so igjusted exausted. Think i just dont wanna exercise anymore. Lazybone, Bah. And as u know i'ts so lame.. Just running on the machine.
stuffy air, too hot weather.... WoooO... All i want to do is chilling to chill/to relax :,-( summer drove/drives  me crazy << Here you are suggesting that summer allready passed. I don't know if that was on purpose or not, but as you wrote the rest of you text in the present tense I'm correcting it. Ahhhhhhuuuuyyuuuuwwwwkkkkk

I would also suggest that you try to be more formal when you write entries like this. When you write as orally as you do here it's a bit hard to tell what level of English you master.

I'm exercising now and I feel exausted. I just don't want to exercise anymore. I'm a lazybone. As you know, it's so lame just running on the machine(treadmill). The air is stuffy, the weather is too hot. All I want to do is to relax/ I just want to relax. Summer drives me crazy.  

Make sure to remember to write capital "I". Otherwise it's pretty good. Nice work :)