I feel like it's not going to happen

Me and my fiance have been ttc for baby #2 for right at 6 months now. Test after test have shown me nothing but heartbreak and disappointment. I can't stand it. Everyone around me is pregnant and I love them all and am very excited for them, but at the same time I just don't want to see any more pregnancy announcements. My period is late, and I took a test about a week ago and it was negative. And honestly I just don't feel like trying anymore. I don't even feel like having sex because it honestly depresses me even thinking about not being pregnant. I just don't know what to do anymore....