OK, lecture time.................
DO NOT LET OTHER PEOPLE MAKE FUN OF YOUR WEIGHT.
I know you can't actually stop them, but you don't have to let it hurt especially when there is nothing wrong with you.
I've just had a quick check around the BMI calculators and this is what I find
If you go by BMI, a 5'5 woman can weigh anywhere between 112 to 149 pounds
So it looks like you are right in the middle of a good weight for your height, but your friend is to skinny, and yes there is such a thing as being unhealthily skinny.
I come back, as I always do to horses, here is Max, bless him a Fjord QH cross, who would of weighed in around 1200 pounds here, and wasn't actually fat here
Compared to Ace, who is the same height, but in this pic weighed under 1000 pounds
Thing is, that Ace at 1200 pounds would look overweight, and Max at under a 1000 would look skinny, because their builds are different, we accept that horses have different frames, and therefore will weigh differently, but we don't give people the same leeway.
Every person needs to have a certain % of fat to be healthy, and you shouldn't push to be below what is healthy for you. Fitness has a lot to do with it as well, muscle is dense so if you are more muscular you will weigh more.
Honestly the best thing we could all do is throw away our scales, that number is meaningless, you should just look at your body, and listen to it as you go about your day, if you look good, and you can do all the things you want to do then you are probably OK.
I am passionate about this for a reason, this is me last year, having lost a LOT of weight
You know what, I looked great, I felt great, but according to my BMI I was still FAT, so I tried to lose some more and it all went pear shaped, well I went pear shaped, and over the year I have regained nearly 100 pounds of what I lost, mainly because I was being unrealistic, and then punished myself for still being fat.
Now I AM fat again, strike that I'm OBESE again, and I need to get back to being fat, and I need to be comfortable with who I am, and the weight I should be, for me to say "Yup, this is good"
I say again, do not let others make you feel bad, they are not your friends, they are probably jealous, you may actually have curves and they would love to be curvey