Perhaps death???? i really need help?

I am so sick and tired, I am trying so hard to lose weight. Every day, i have been spending time in the gym, and i am so exhausted, and my body is aching so badly. =( I tried everything, from yoga to dance, and to this indoor bicycle thing, which is freaking, tiring. I really wanna lose weight. I know time, will heal everything, but, how long do i need to continue like this. I am so worried. Besides, I hv been watching my food so tightly, and I am eating veggie and fish for everyday, except for the morning where i hv bread. I can't take it anymore. Plus, i like this hunky guy, which i met in the gym. he is so, handsome and masculine. But, he is a trainer. How should i approach him? Both this crush thing and losing weight is killing me. I am gonna die soon. advice pls..