Feeling Betrayed: The Pain of Losing a Friend

I'm so done. I'm done with everything. I thought I had a friend who valued me the way I valued her, but I did nothing but hurt her and apparently unintentionally manipulate her and she hasn't thought of me as her best friend in a long time. All I do is hurt people. What's the point in having friends. All that comes from friends is eventual heartbreak when someone else comes along or when they bottle things up and don't tell you you've hurt them and I just hurt people and no matter how good the friendship seems it eventually comes to an end. I'm done. No one needs me or legitimately wants me around other than the dogs so I'm done needing others and wanting others around too. I'm sick of valuing people so highly while they don't value me the same. I'll keep the friends I have but when they eventually leave like the one who I thought was my best friend, then I'm done searching for more. Screw it all.