-16 years with an 'LTR' -Some guy keeps chatting her up; I tell her to block him, like a month later still 'platonically' talking to him -Today was the final straw when she messages me she's studying with another guy on the day we usually fuck and the day I said I was available on (He definitely isn't a threat, but for me it's the principal of it all) -Was about to write a full FB paragraph on why I was pissed but ended up instead saying 'yeah nah laterz' -How do I take it from here?

P.S. I know my structuring is relatively autistic, but please stay on the point of post.