Understanding Scorpio Men

Hi, I'm a Sagitarrius. My fling is a Scorpio, we had this relationship that was from a lover and it turns into friends. He used to be passionate with me, was pretty controlling and jealous. He try to cheat on me with that other woman who didn't entertain him so he gets back to me. He is no longer working at our company. We lost contact for more than 4 months, he said I was the one that didn't bother to check him while he was still there. I saw him falling for other girl and that was when I gave up and we did the no-contact for that long. A few weeks ago he contacted me, saying he misses me and wasn't in touch with anyone except for me. One day I was sulking, he tried to recover things up. He said he was the only boyfriend of mine, I cooled down and felt pity towards him. Then we got back together and met last week, he changed after we met. He is no longer that romantic human being that I knew a few weeks before. He even said we were only friends, I told him you were the one that said you are my only boyfriend. We got into a fight again yesterday, and this time I treated him like an enemy. Spitting fire since my heart is broken now. He said, he didn't want a fight and just want us to be nice to each other and I am the closest person to him at workplace. Who in the world would be a nice person when someone played them? I'm a Sag and I rarely hold grudge with people. He should have left me alone after we did the no-contact, he came back just to bring out pain to me. I thought he would change but he didn't. After being lightly intimate with me, he would changed into non-romantic person. So, to all Scorpio's out there.. Tell me if this is just kind of a test or he is just playing me. I am so broken right now. I'm so loyal to him even while we are not together, I told him I didn't go out romantically with anyone during our no-contact. Thank you.

Note: Sorry for my English, it is not my first language but I hope you understand.