No one understands how depressed i feel. i can't get pregnant. should i just give up?

I am sorry: I am sorry you have been unsuccessful. Do you have a close friend, spouse or counselor with whom you can speak? No one can understand how depressed you feel, but there can be those who can empathize and provide support. I truly encourage you to speak with someone about your feelings on the matter. Consult with an ob/gyn / fertility specialist about your difficulty getting pregnant.

Seek good help: Infertility and feelings of depression go together incredibly often. There are specific limitations that sometimes lead people to give up, but if you haven't had a responsible thorough evaluation by a specialist, and had at least one good session with a fertility counselor you should seriously consider doing so before calling it quits.