Hello everyone I wanted to share my problem because I want all your advice please I'm underweight since forever I'm 19 years old and soon 20. My height is 149 cm and my weight is 37 kg I think I hate that I'm underweight cause sometimes they make fun of me that I'm like a child

I'm in college and all my brothers and my sister are taller than me and I'm also very short Im the shortest plus i'm the eldest '( my weight was 39 I think but I lost weight cause of long period stress and it's hard for me to gain weight and my mother is the only one who cooks in home and sometimes she's lazy or tired and I don't know how to cook I really want to gain weight at least being short is not a big deal to me cause My mum is short and mu aunt is shorter than me !! but they perfect weight that's why they are bullied please help yesterday I came back to home after going out with my friends and I cried cause it really hurt my feelings inside I have cheeks luckily but not enough.. please help me cause I'm not confident anymore
"Sorry for the bad grammar"
appreciate any help and tips