Why i am neglected by god ?

I am a 18 years old boy. Some of the people ( if they answer) will think I am too young to ask these kind of questions or i am too young that's why i am asking these type of questions. People says believe in god but why should i do if he has not given me anything ( now please don't write that if your are having a laptop and internet connection to ask this question then you are enough rich, do remember everything cannot be bought with money). I don't have good body,no good looks. My cousins says that i don't have brain ( even my parents says that). Most of the time they will make fun of me as of my bad looks. I am 18 years 6 months old and only 45 kg. Can you imagine that a college going guy only weights 45 kg ? Going to gym from last 2 years. First day in gym 42 kg, current day in gym 45 kg. why should i believe in god? I have taken many protein shakes none of them helped me even after they helped others. And the most important think that why it only happens to me like 2 years ago i was able to gain weight and i fall ill (jaundice). Next year again same problem only then when i was able to gain some weight. This year same problem again.This makes me more weak and ugly. No good body No good looks. Each and every cloth fits loose on me which makes very ugly. No best friends, no girlfriend till now, no friend as girl. i tried to chat with my crush and she is supper uninterested in me every time she answers "hmmm". Now why this happens to me? I lack in confidence. Cannot talk to the group of people. Cannot be able to give good presentation. Is the god only finds me to do all these things ? why me every time? People don't remember me. If they spend a day with me they will never come to me again or will start ignoring me. I tried to study hard but failed. I tried to play sports but failed. not able to catch a single ball in cricket. no team selects me. Every time other people will say this guy does not have enough brain to keep with us. Every time nervous. Each morning when i go to clg or work my heart will be pumping like i have done a murder of someone and police is on its way. This thing happen to me when i go for regular work or college but suppose what will happen when i will go for job interview where there will be 100 of people? My chest is pigeon type chest which stops me to going to the beach or swimming pool. Because people say hey "hahah look at his chest". Who likes to be the center of fun every time? Now why should i believe in god? I am praying from long time but nothing happen none of prayer got accepted if he is neglecting me then why should i believe in him? My mom says belive in god he will make you super perfect. But my question is that if he has not done anything to me from last 18 years then what will he do. The most important and fun part of life has gone. And i never enjoyed it as others did. Every time I approach to a girl..she will look at me as I am a rapist or i will eat her. And now can anybody give answers to these question?