I had sex with my ex... but we were still talking time time just as friends and he was still supportive of me. We never had sex while dating until we broke up.

Well the day after i had sex he never texted or called me after I texted him... and I saw his Snapchat score go up😕 still no text message and on the map it said

“ last seen 2 hours ago” and it just broke my heart in a million pieces how he hurt me AGAIN and I trusted him and we were friends

Any opinions on what I should do about this? He also goes to my school we’re seniors