Why would the internet know what looks good on you? Did you submit a photo?
Now, it is true, that some girls just do NOT look good with short hair -- the same as some girls look horrid in long hair! But that needs to be judged solely on an individual basis. There are NO clear-cut rules!
The only way to know for sure is to do it. However, there is a better way -- go and have your [free] consultation with a qualified professional hair stylist, someone that styles many different people. They have the experience and the skills to know what will look good on different kinds of people. There is so much to consider: shape of face, build of the person, age, texture of hair, etc. One of the biggest is whether YOU know what to do with it short! So many girls just have NO clue as how to style their hair to best advantage. So be sure you know what to do. If you have the right hair for it, it can look terrific and will be easy to do. But if you have the wrong type of hair, it will be a lot of work to look good, and may never look its best. Get professional advice before doing anything.
In the end, it is YOU that needs to decide. If you really want it short, then go for it. It is only hair, and it does grow back (don't we know it!) and you can let it get long again. You may find you and everyone around you loves it, or maybe not. Then you will know for certain.