Before your relationship with Alhaitham became complicated to deal with, Alhaitham was a completely loving person who promised you many things when the two of you lived together. But one day his way of being with you changes completely, because he discovers that there is another person interested in you (since the relationship is over) and that is what makes him a Toxic and Possessive person when he sees that you have quickly changed your feelings for him. Alhaitham wouldn't accept that.