A really weird story

Okay so I just had a break up with a guy I really liked and spent so much time on him and it really hurt when he just left me. So instead of being okay about it I had tried to save the relationship by telling him how I feel about him. Then my friend texts me saying to leave him alone cuz he might kill himself and for some reason it’s “all my fault” cause he wants to kill himself, like it’s just so fucking unfair for me. Then I got a text from his best friend that he cried himself to sleep when nothing even happened to him in the first place and it was me who was really impacted…So he basically lied and said he was gonna kill himself, making my friend and I worried, then he waste my time helping him with all his problems, never asked me how I felt about anything that’s upsetting, and used me for sexual needs. After that day he texted me telling me he was in the wrong and that he wanted to be friends with me and I just said yes because I still loved him but now that I am over him I just don’t wanna have any contact with him…my other friends say I should drop him but I don’t want him to be sad too and go and kill himself, what should I do?