A moment of weakness that made things clear

I had a moment of weakness and I texted my ex and asked him how he was doing, and he usually gets back to me but this time he didn’t and I am really hurt. He also tweeted “This is the happiest I’ve been” and I guess I finally accepted that he wants nothing to do with me. It seems like life without me is better. I am honestly getting really depressed and my self harm is triggered I feel worthless not needed and I just want to disappear.