Wow that hurts

I’ve finally moved on from my horrible ex and started to trust a guy again, we’ve been talking for about a week and we had a date set up for today and suddenly he messaged me saying “if you aren’t over your ex then say so. I’m done with this bullshit highschool drama” and unfriended me. I had no idea what he was talking about so I asked him over Facebook what he was talking about and he explained that my exes new gf messaged him saying I was just gonna fuck him to make my ex jealous, which was not at all what I was planning on doing. I just wanted a date, watch movies and meet his pets. But it’s been five hours and he hasn’t even read those messages of me trying to explain it. I feel even more hurt and depressed than when I was with my ex because this time I was really excited and genuinely happy. I have severe depression and anxiety and I’m at my breaking point. I was secluded and made to have no friends for over a year, I have no one to turn to and my heart is breaking over the fact that he couldn’t have just let me move on even though he cheated two days moving into his own apartment. I just want to be happy