am i weak?

i'm 16 and my mom died july 27th 2016. she had 3 types of cancer throughout 7 years. i was extremely close to my mom, especially since i have three older brothers and no sisters. since she's died i've fallen apart. my family and friends say i'm doing very well and i'm brave but i can't help but kick myself down. i've been struggling in school a lot, to the point of a truancy letter. im not a bad kid. i just struggle w diagnosed generalized anxiety, ocd, and depression. i feel hopeless and worthless a lot because i'm not doing as well as my friends. i know i should give myself time but i think everyone is tired of waiting for me to heal. i go to therapy and horse therapy every week and try my best to heal. am i weak? :(