How to get out of a relationship with my bf of 3 years?

Leave him and let know people around u( friends,family) about his behaviours , let them know he is sujcidale... and just break up over the phone, if he try to get closer to u call the cop!! He is insecure in the same time jealous possesif! leave him instead of destroying ur life, cuz he doesnt let u live. he is kinda crontrolling u. goodluck