Feeling Alone After Cutting Off Toxic Friends

I feel so alone.I cut off a lot of old friends because they backed me in a corner and blackmailed me.Anyways the first guy was saying stuff about my body and other girls body's tried to turn everone against me.When I told the girls a couple of them kept talking to this guy and does not talk to me a lot so I don't think they believe me. One of the girls even got rid of the proof that he was doing this .Anyways after that went down my old use to be friend tried to blackmail with a voice clip of my ex and I fighting I asked him to tell my ex to get rid of it I don't think he did.So I tried to fight back but it failed I blocked them all.I am sad now because I feel like maybe some of them don't deserve to be blocked.Am I in the wrong?