i got boone at the beginning but he died sooner than later so i found the chick at 188 but she died 5 minutes later after we ran into some scorpions so i am guessing in hardcoe mode they dont just faint and where can i find another and how can i help them live longer i cant be running over and sticking stimpax in them every 5 seconds

Even if you could run over to stimpack them, I believe in hardcoe mode they won't instantly heal them, just like they don't instantly heal you.

Give your companions better armor. If you leave them in their default 2-6DT clothes they can be fragile in melee range, especially early on when their clvl & hit points are still low. Don't let them get swarmed, because while companions are often crack shots, they're not generally geared to being super-tanks, unless you have a very high charisma + give them high DT armor. Put stimpacks/aids into their inventory, they'll occasionally use them on their own (but not all the time).

Mostly...if you don't like nursemaiding them in hardcoe, don't use them. Also, Lily is far away on a mountaintop beyond New Vegas/The Strip, and the others require doing some quests or combat to acquire. Arcade in the Mormon Fort can be had early without his high speech checks if you have an INT of 2 or less.

just use fr their quests. shouldn't be a problem with rex if you have been to most places. shouldn't be to hard with veronica once you can find the brotherhood of steel bunker.

Get faw-Oh wait this isn't FO3. Get Lily, enough said.