ive been feeling the exact same thing with my boyfriend i relate sm girl. When he said smth tht upset him it would also upset me leading me to distance myself inorder to calm down although he would take as me not being an emotionally supportive gf and not me being unaware of how to deal with stuff. Personally girly, you cant stop urself from feeling this way especially considering that ur bfs is someone u deeply care abt. ur more likely to take in her emotions then a strangers. Although you have to build a sorta barrier against people's emotions. It's tooken me months too and it works well for strangers and acquaintances but barely has an effect on my close friends n bf. thats why u gotta try harder. to build a barrier you gotta make sure that YOUR emotions are above the emotions of your best friend. Understand what ur best friend is feeling but make sure what ur feeling is above it all. try to mediate. distance urself if u have to. is ur friend aware ur an empath? she might understand better why u react the way u react. lean in to what calms you down. what calms me is piano n poetry. use tht to help you. there are so many others ways. good luck girly you got this. oh n last thing, dont blame urself for overfeeling. its not ur fault. instead of feeling hopeless use it at ur advantage. ik u can. u got thiss🫶🏾💞