Inside the sheath, their proboscis is actually six arms: two saws, two manipulators, a spitter, and a sucker. They saw open your flesh and use the manipulators to sense blood vessels, which they pierce to suck blood.
Madness string 100549
I think my best advice on staying positive is to talk to people who make you laugh or smile. There's a lot of research on this, and I have personally experienced that laughing makes you happier. Being around people who make you feel good is good. I know it sounds obvious, but sometimes people forget.