I can't take it anymore

My English it's not good, so I apologize if something is not understandable.

My story starts when I was a teenager, I meet this wonderful guy in highschool and we fall in love. After 2 years of relationship he broke up with me, my soul was torn and I only think in that moment of desesperation what can i do to keep him with me.

Two months later he contact me saying he miss me and we both agreed to be sex-friends. I accepted it with no doubt even though I was virgin in that time.

The time past, and one night he send me a message via WhatsApp: "I really like you, i miss you but I can't hurt you anymore". He inmediately erase it but just for pure coincidence I was in a call with my best friend so I read it. That gives me the encouragement for telling him that my feelings have never changed.

Unfortunately he rejected me inmediately and we start another relationship based in only and pure friendship.

For my part, I decided to surrender sincerely with him.

Since I live with my parents the house is occupied most of the time.

But my grandma traveled a week ago and left her house in my charge. I decided to invite him because I don't see him in 10 months (we comunicate via discord)

When he cames I was expecting a funny night with my new best friend boy, but he wanted more than that. He kissed me, I ask him if it was sure about that, he agreed, touched me sexually and we had sex.

After that I had a crisis because I felt guilty, he hugs me and says that I'm an important person and he cares about me.

My interpretation was that he realized that he wanted more than a friendship and I was so happy for that.

The next day he tells me that he was also in conflict with that. And my heart hurts a lot.

I told him that I'm not gonna accept just to be friends after he brokes the terms that he imposed to me. Then I put a final term: I told him that on this next Saturday, he has to tell me if he wants to be with me and that i want to build a loving relationship, get to know each other and determine if we want to be a couple again. He agreed

But, 3 days after that conversation, another of my highschool friend that it's in the same discord chat than him told me: "D. likes your ex, she just wants him for casual sex and he is reciprocating, answering her nude pics on Instagram and they speak suggestively".

I couldn't believe how used I had been.

While I was crying and feeling heartbreak, he was sexting with another girl.

This Saturday im gonna say him ow much it hurts me and finish this but I'm afraid into missing him again and talk again with him.

I just need support please help