At the age of 19, it is premature to have a serious relationship with a girl. You should concentrate on your studies and try to get a job before thinking about marriage. As per your horoscope you will have a good marriage around 2030.
The purpose of Our life is to help God in his duties of sustenance of this universe. He gives you life when he needs something to carry out his duties and he provides you with the necessary tools to carry out your assignment and once that is completed as he needs it to be, he takes you back for the next assignment as and when needed. So death is not in your hands and only when His assignment to you is completed, he takes you back for your next assignment as and when needed.
You do not have any serious problem as per your horoscope. Thighs, legs and feet are most vulnerable due to poor strength for the related houses. May be a change of place of about 1000 kms will help you.