My friend date of birth is march 15th 1988. how his marriage life will be

Your friend is dragon. If he was a man, he would have found a good wife who supported his career very well. If she was a woman, she would have found a good husband. However, I can't tell when your friend will get married. Accoridng to your friend's birth date, he/she will live as long as nearly 80 years. So he/she won't have serious health problems.

Your friend was born in spring. Spring dragons are said to have their own business.