You're not fat. I'm 159 and I'm 50kg. If you keep calling yourself fat I'm going to cry.
HAHAHAHA it's okay. Just be more confident in yourself. Perhaps your family just have a different opinion on what is considered skinny, fat or average. But remember that when it comes to yourself, if you think you are perfect as you are, then anyone else's opinion is secondary.
No, you are not. I used to have an "okay" size (164, 53 KG. not fat neither thin) but my family keep calling me fat and I believe what they said to the point of thinking "it's fine if I eat a lot. I am fat anyway" and now I really am fat (i was 83 last week and 80 now, yes on diet).
So, don't believe with it, your size is fine. You know your body better. If you depressed over it you will have eating disorder like anorexia, bulimia or to the opposite like, "self hatred that make you believe that you are fat and the people hate it, so what's the point on holding back" like what I had.
If you are comparing yourself to a straw.then yes you are very fat.

I'm 158cm and 44kg....am I considered fat...? My mom and sis keep calling me fat ;A;;