I need help i've wandered around the school countless times and don't know what to do will someone help me please

What is the mission? Have you checked the map on the top screen that tells you where to go?

ok i got that par4t now im stuck again, its on the mission where you have to bring yumi to sector 5 to get rid of the virus, there is a part in it where you use ulrich to dash across the floor taking breaks after each set well i kept dying and eventually the game stops letting me reload ulrich is this a glitch?

Either it stops letting you reload him because he fell too many times and lost all of his life, or it's a glitch.

A tip I could give is for you to go as fast as you can at the first moment possible and to not stop, even when the platforms are turning right behind you. It can be tough, but I eventually got it.

i got it i beat it twoce