Why don't women like me!?

You answered your own question with these 3 words: nice, shy, and chubby. These are not qualities most women like. Being nice is not going to get you girls. Girls want a challenge and not some dude that puts them on a pedestal. Being shy means you are not confident and not approaching girls. You have to be able to talk to girls and gain experience. I think chubby is self explanatory. Go to the gym and eat healthy. If you are not happy with your social life with women then start making changes now.

Big and chubby. I too am the shy big and tall type. You know what I discovered is the tiny petite girls love big teddy bear guys that are sweet. You need to have confidence and tell the girl that you are attracted to her physically and emotionally. For her to get the gears going in her brain that say hey I want to make a romantic step with her you need to grease the axles by imprinting the idea in her mind with your words and actions. So be the gentleman you are but at the same time know what you want and dont be scared to make it known. But if she isnt ready to say she feels the same way be sure to handle the scenario with dignity, grace and confidence. These are the traits she will find attractive and can easily offset your chubbiness. Good luck sir.