The best piece of advice I've ever been given is this: You don't have to attend every fight you've been invited to. When someone reveals themselves to be an ass on social media or a hook-up app: report, block, and move on. We all have only a finite amount of energy. Why waste it on hateful people on Grindr? And why let someone you don't even know undermine your confidence and sense of self? You don't owe him anything, not even a response. Report, block, move on.