It is not the end of the world. Borderline traits are common in this age group. Males have less chances to develop full blown BPD. Review his personality type or disorder on oshoclinicpanchkula.com

The most important thing you can do to help a friend with BPD is to take some time to just listen and validate his feelings. You may not necessarily agree with his evaluation of a situation or feel that the intensity of his feelings is justified by the situation (strong ​emotional reactions are part of the disorder). However, you can still let him know that you understand how he's feeling and how difficult that must be. Receiving validation from another person can provide tremendous relief to someone with BPD. Many people with BPD grew up in emotionally invalidating environments and expect that no one cares how they feel. Other people with BPD did not grow up in a poor emotional environment. Because of the nature of the disorder, however, they have grown accustomed to people telling them that they are overreacting. So, having someone actually care about how they feel can be powerful. its really considerate of you P.S: Donot ignore the threats of harm