every time i try and improve myself something comes up and ruins everything

i really want to just disappear and start a new life or just go missing. i doubt anyone would care and now that i know my ex best friend led me on with being friends for months has really just set my heart in stone. i can't trust anyone and it really feels like i can just go away without repercussions. i really don't know what to do anymore, but i really want to finish my bachelor's degree. giving up just sounds like the easiest way out.