My ex changed their number

Yea so the last interactions with my ex were really bad and messy. He told me he hates me and he’ll hate me forever and that he’s been hooking up with other girls and blocked me on everything. As you can imagine I was/still am so heartbroken. Yea sometimes I could have been annoying but hate me forever really ?? Anyways, even though he said all these horrible things (pretty sure he exaggerated a bit) I still can’t shake the thought of him. even though it was really hard for me I didn’t try to find a way to reach out hoping that distance will make the heart grow fonder yk. I would look at our chats from time to time, usually when I go on there the little bar says iMessage but I know if I send something it won’t deliver (but it would a few days later which was weird). I go on our chat today and it says “Text Message” and a green send button. I sent out a test text and the bubble is green, I called the number and it said “this number is no longer in service”. He changed his number. Idk why that hurt but it hurt. I’m heartbroken all over again. I’m all alone, I lost all my friends, started a new school, I have no one and this just hurt me so beyond words. I have no hope. Has anyone else had an experience like this? Any advice? Will he come back?