Some sad animes are -:
1)Your lie in April
2) Anohana
3) Angel Beats (currently watching)
4) Plastic memories (currently watching)
5)Grave of the Fireflies (heart wrenching)
6) Weathering with you
7)I wanna eat your pancreas
8)Garden of words
9)A silent voice (this one is according to others...I didn't cry at all...I know I'm weird lol...it's more like hopeful than sad if you get what I mean)
10) Kimi no nawa( Idk if this counts but I still cried for no reason while watching this so sure why not.... already told ya I'm weird😂😂)