Im extremely possessive & get angry & jealous very easily.i hurt myself whenever i see my friend being close with others & im paranoid. i think im bpd?

Possible, get help: borderline personality disorder can encompass the symptoms you mention. self injury is a problem and needs to be addressed, regardless of the label or diagnosis. DBT (dialectical behavioral therapy) is a great treatment for BPD and can help with those negative thoughts. There are also medications if a co-occuring depression is present